diff --git a/src/cmd/changelog-webapp/app.yaml b/src/cmd/changelog-webapp/app.yaml
index 7c40e26..cb2fb49 100644
--- a/src/cmd/changelog-webapp/app.yaml
+++ b/src/cmd/changelog-webapp/app.yaml
@@ -8,13 +8,10 @@
   COS_CHANGELOG_CLIENT_SECRET_NAME: "cos-changelog-client-secret"
   COS_CHANGELOG_SESSION_SECRET_NAME: "cos-changelog-session-secret"
   COS_CHANGELOG_OAUTH_CALLBACK_NAME: "cos-changelog-oauth-callback"
-  COS_CHANGELOG_ARTIFACTS_BUCKET_NAME: "cos-changelog-artifacts-bucket"
-  COS_CHANGELOG_ARTIFACTS_PATH_SUFFIX_NAME: "cos-changelog-artifacts-path-suffix"
 
   # Webpage configuration
   STATIC_BASE_PATH: "src/cmd/changelog-webapp/static/"
   CHANGELOG_QUERY_SIZE: "50"
-  BOARD_NAME: "lakitu"
 
   # External sources
   COS_EXTERNAL_GERRIT_INSTANCE: "https://cos-review.googlesource.com"
diff --git a/src/cmd/changelog-webapp/controllers/pageHandlers.go b/src/cmd/changelog-webapp/controllers/pageHandlers.go
index 90e1975..8f943c8 100644
--- a/src/cmd/changelog-webapp/controllers/pageHandlers.go
+++ b/src/cmd/changelog-webapp/controllers/pageHandlers.go
@@ -46,9 +46,6 @@
 	externalGoBInstance            string
 	externalManifestRepo           string
 	envQuerySize                   string
-	envBoard                       string
-	artifactsBucket                string
-	artifactsPathSuffix            string
 
 	staticBasePath          string
 	indexTemplate           *template.Template
@@ -86,20 +83,10 @@
 	if err != nil {
 		log.Fatalf("Failed to retrieve secret for CROSLAND_NAME with key name %s\n%v", os.Getenv("CROSLAND_NAME"), err)
 	}
-	artifactsBucket, err = getSecret(client, os.Getenv("COS_CHANGELOG_ARTIFACTS_BUCKET_NAME"))
-	if err != nil {
-		log.Fatalf("Failed to retrieve secret for COS_CHANGELOG_ARTIFACTS_BUCKET_NAME with key name %s\n%v", os.Getenv("COS_CHANGELOG_ARTIFACTS_BUCKET_NAME"), err)
-	}
-	artifactsPathSuffix, err = getSecret(client, os.Getenv("COS_CHANGELOG_ARTIFACTS_PATH_SUFFIX_NAME"))
-	if err != nil {
-		log.Fatalf("Failed to retrieve secret for COS_CHANGELOG_ARTIFACTS_PATH_SUFFIX_NAME with key name %s\n%v", os.Getenv("COS_CHANGELOG_ARTIFACTS_PATH_SUFFIX_NAME"), err)
-	}
-
 	externalGerritInstance = os.Getenv("COS_EXTERNAL_GERRIT_INSTANCE")
 	externalFallbackGerritInstance = os.Getenv("COS_EXTERNAL_FALLBACK_GERRIT_INSTANCE")
 	externalGoBInstance = os.Getenv("COS_EXTERNAL_GOB_INSTANCE")
 	externalManifestRepo = os.Getenv("COS_EXTERNAL_MANIFEST_REPO")
-	envBoard = os.Getenv("BOARD_NAME")
 	envQuerySize = getIntVerifiedEnv("CHANGELOG_QUERY_SIZE")
 	staticBasePath = os.Getenv("STATIC_BASE_PATH")
 	indexTemplate = template.Must(template.ParseFiles(staticBasePath + "templates/index.html"))
@@ -119,24 +106,11 @@
 }
 
 type changelogPage struct {
-	Source          string
-	Target          string
-	SourceBoard     string
-	SourceMilestone string
-	TargetBoard     string
-	TargetMilestone string
-	QuerySize       string
-	RepoTables      []*repoTable
-	Internal        bool
-	Sysctl          *sysctlChanges
-}
-
-type sysctlChanges struct {
-	Added    []string
-	Changed  []string
-	Deleted  []string
-	NotFound string
-	NotEmpty bool
+	Source     string
+	Target     string
+	QuerySize  string
+	RepoTables []*repoTable
+	Internal   bool
 }
 
 type findBuildPage struct {
@@ -336,7 +310,7 @@
 	}
 	var err error
 	if err := r.ParseForm(); err != nil {
-		err = changelogTemplate.Execute(w, &changelogPage{QuerySize: envQuerySize, Sysctl: new(sysctlChanges)})
+		err = changelogTemplate.Execute(w, &changelogPage{QuerySize: envQuerySize})
 		if err != nil {
 			log.Errorf("error executing findbuild template: %v", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
@@ -345,19 +319,9 @@
 	}
 	source := r.FormValue("source")
 	target := r.FormValue("target")
-	sourceMilestone := r.FormValue("source milestone")
-	targetMilestone := r.FormValue("target milestone")
-	sourceBoard := r.FormValue("source board")
-	if sourceBoard == "" {
-		sourceBoard = envBoard
-	}
-	targetBoard := r.FormValue("target board")
-	if targetBoard == "" {
-		targetBoard = envBoard
-	}
 	// If no source/target values specified in request, display empty changelog page
 	if source == "" || target == "" {
-		err = changelogTemplate.Execute(w, &changelogPage{QuerySize: envQuerySize, Internal: true, Sysctl: new(sysctlChanges)})
+		err = changelogTemplate.Execute(w, &changelogPage{QuerySize: envQuerySize, Internal: true})
 		if err != nil {
 			log.Errorf("error executing findbuild template: %v", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
@@ -392,28 +356,6 @@
 		Removals:  removed,
 		Internal:  internal,
 	})
-	page.SourceMilestone = sourceMilestone
-	page.SourceBoard = sourceBoard
-	page.TargetMilestone = targetMilestone
-	page.TargetBoard = targetBoard
-
-	page.Sysctl = new(sysctlChanges)
-	var foundSource, foundTarget bool
-	page.Sysctl.Added, page.Sysctl.Changed, page.Sysctl.Deleted,
-		foundSource, foundTarget = changelog.GetSysctlDiff(artifactsBucket, artifactsPathSuffix, sourceBoard,
-		sourceMilestone, source, targetBoard, targetMilestone, target)
-	page.Sysctl.NotEmpty = false
-	if !foundSource {
-		page.Sysctl.NotFound += fmt.Sprintf("sysctl file for %s-%s-%s not found.<br>", sourceBoard, sourceMilestone, source)
-		page.Sysctl.NotEmpty = true
-	}
-	if !foundTarget {
-		page.Sysctl.NotFound += fmt.Sprintf("sysctl file for %s-%s-%s not found.<br>", targetBoard, targetMilestone, target)
-		page.Sysctl.NotEmpty = true
-	}
-	if len(page.Sysctl.Added) > 0 || len(page.Sysctl.Changed) > 0 || len(page.Sysctl.Deleted) > 0 {
-		page.Sysctl.NotEmpty = true
-	}
 	err = changelogTemplate.Execute(w, page)
 	if err != nil {
 		log.Errorf("error executing changelog template: %v", err)
diff --git a/src/cmd/changelog-webapp/static/templates/changelog.html b/src/cmd/changelog-webapp/static/templates/changelog.html
index 638184e..aeca7c9 100644
--- a/src/cmd/changelog-webapp/static/templates/changelog.html
+++ b/src/cmd/changelog-webapp/static/templates/changelog.html
@@ -18,7 +18,7 @@
   </div>
   <div class="main">
     <h1>Changelog</h1>
-    <p class="feature-info">Retrieve a list of commits and sysctl changes between two
+    <p class="feature-info">Retrieve a list of commits between two 
       Container-Optimized OS builds.<br>
       Example Input: <b>cos-rc-85-13310-1034-0</b> or <b>13310.1034.0</b>
     </p>
@@ -43,36 +43,8 @@
           <input type="text" class="target" name="target" placeholder="Image Name or Build Number" required>
         {{end}}
         <input type="hidden" name="n" value={{.QuerySize}}>
-      </div>
-      <div class="text">
-        <label>From </label>
-        {{if (ne .SourceMilestone "")}}
-          <input type="text" class="source" name="source milestone" placeholder="Milestone Number" value={{.SourceMilestone}} required>
-        {{else}}
-          <input type="text" class="source" name="source milestone" placeholder="Milestone Number" required>
-        {{end}}
-        <label> to </label>
-        {{if (ne .TargetMilestone "")}}
-          <input type="text" class="target" name="target milestone" placeholder="Milestone Number" value={{.TargetMilestone}} required>
-        {{else}}
-          <input type="text" class="target" name="target milestone" placeholder="Milestone Number" required>
-        {{end}}
         <input class="submit" type="submit" value="Submit"><br>
       </div>
-      <div class="text" style="display: none;">
-        <label>From </label>
-        {{if (ne .SourceBoard "")}}
-          <input type="hidden" class="source" name="source board" placeholder="Board Name" value={{.SourceBoard}} required>
-        {{else}}
-          <input type="hidden" class="source" name="source board" placeholder="Board Name" required>
-        {{end}}
-        <label> to </label>
-        {{if (ne .TargetBoard "")}}
-          <input type="hidden" class="target" name="target board" placeholder="Board Name" value={{.TargetBoard}} required>
-        {{else}}
-          <input type="hidden" class="target" name="target board" placeholder="Board Name" required>
-        {{end}}
-      </div>
       <div class="radio">
         {{if .Internal}}
           <label>
@@ -174,31 +146,6 @@
       </a>
     {{end}}
     {{end}}
-    {{if .Sysctl.NotEmpty}}
-    <h2>Runtime Sysctl Changes:</h2>
-      <div>{{.Sysctl.NotFound}}</div>
-      <table class="repo-table">
-        {{range $sysctl := .Sysctl.Added}}
-        <tr>
-          <td>Added:</td>
-          <td>{{$sysctl}}</td>
-        </tr>
-        {{end}}
-        {{range $sysctl := .Sysctl.Changed}}
-        <tr>
-          <td>Changed:</td>
-          <td>{{$sysctl}}</td>
-        </tr>
-        {{end}}
-        {{range $sysctl := .Sysctl.Deleted}}
-        <tr>
-          <td>Deleted:</td>
-          <td>{{$sysctl}}</td>
-        </tr>
-        {{end}}
-      </table>
-    {{end}}
-  </table>
   </div>
 </body>
 </html>
\ No newline at end of file
diff --git a/src/cmd/changelog-webapp/static/templates/readme.html b/src/cmd/changelog-webapp/static/templates/readme.html
index aef6415..72a3c45 100644
--- a/src/cmd/changelog-webapp/static/templates/readme.html
+++ b/src/cmd/changelog-webapp/static/templates/readme.html
@@ -62,13 +62,6 @@
           go/crosland
         </a>.
       </p>
-      <p>
-        It also shows the sysctl changes between two builds if milestone
-        numbers are correctly provided and sysctl values have been dumped for these builds.
-      </p>
-      <p>
-        Eaxmple: Milestone Number = 89, Build Number = 16108.403.22
-      </p>
       <h2>Find Build</h2>
       <p>
         This feature allows you to locate the first build containing a desired
diff --git a/src/pkg/changelog/changelog.go b/src/pkg/changelog/changelog.go
index 81713e4..3d6fea3 100644
--- a/src/pkg/changelog/changelog.go
+++ b/src/pkg/changelog/changelog.go
@@ -15,9 +15,8 @@
 // This package generates a changelog based on the commit history between
 // two build numbers. The changelog consists of two outputs - the commits
 // added to the target build that aren't present in the source build, and the
-// commits in the source build that aren't present in the target build. It
-// also finds the sysctl value changes between two builds by fetch artifacts
-// from GCS. This package uses concurrency to improve performance.
+// commits in the source build that aren't present in the target build. This
+// package uses concurrency to improve performance.
 //
 // This package uses Gitiles to request information from a Git on Borg instance.
 // To generate a changelog, the package first retrieves the the manifest files for
@@ -31,16 +30,11 @@
 package changelog
 
 import (
-	"context"
 	"errors"
-	"fmt"
-	"io/ioutil"
 	"net/http"
 	"regexp"
-	"sort"
 	"strings"
 
-	"cloud.google.com/go/storage"
 	"cos.googlesource.com/cos/tools.git/src/pkg/utils"
 	"github.com/beevik/etree"
 
@@ -304,98 +298,7 @@
 		}
 	}
 	outputChan <- additionsResult{Additions: repoCommits}
-}
-
-// getSysctlDiff finds sysctl difference between the two builds.
-func GetSysctlDiff(bucket, pathSuffix, sourceBoard, sourceMilestone, source, targetBoard, targetMilestone, target string) (
-	[]string, []string, []string, bool, bool) {
-	sourceBuildNum, targetBuildNum := resolveImageName(source), resolveImageName(target)
-	sourceChan := make(chan map[string]string)
-	targetChan := make(chan map[string]string)
-	go fetchSysctlToMap(fmt.Sprintf("%s/%s%s/R%s-%s",
-		bucket, sourceBoard, pathSuffix, sourceMilestone, sourceBuildNum), sourceChan)
-	go fetchSysctlToMap(fmt.Sprintf("%s/%s%s/R%s-%s",
-		bucket, targetBoard, pathSuffix, targetMilestone, targetBuildNum), targetChan)
-	sourceSysctl := <-sourceChan
-	targetSysctl := <-targetChan
-	foundSource := false
-	foundTarget := false
-	// if either one of the sysctl file doesn't exsit,
-	// return an empty list.
-	if len(sourceSysctl) > 0 {
-		foundSource = true
-	}
-	if len(targetSysctl) > 0 {
-		foundTarget = true
-	}
-	if !foundSource || !foundTarget {
-		return []string{}, []string{}, []string{}, foundSource, foundTarget
-	}
-
-	addList := []string{}
-	changeList := []string{}
-	deleteList := []string{}
-	for newName, newValue := range targetSysctl {
-		if oldValue, found := sourceSysctl[newName]; !found {
-			addList = append(addList,
-				fmt.Sprintf("%s: %s", newName, newValue))
-		} else if oldValue != newValue {
-			changeList = append(changeList,
-				fmt.Sprintf("%s: %s -> %s", newName, oldValue, newValue))
-		}
-	}
-	for oldName, oldValue := range sourceSysctl {
-		if _, found := targetSysctl[oldName]; !found {
-			deleteList = append(deleteList,
-				fmt.Sprintf("%s: %s", oldName, oldValue))
-		}
-	}
-
-	sort.Strings(addList)
-	sort.Strings(changeList)
-	sort.Strings(deleteList)
-
-	return addList, changeList, deleteList, foundSource, foundTarget
-}
-
-// fetchSysctlToMap fetches sysctl file from artifacts in GCS created
-// by build-executor and map each line to a <parameter_name: value>
-// pair.
-func fetchSysctlToMap(path string, outputChan chan map[string]string) {
-	outMap := make(map[string]string)
-	ctx := context.Background()
-	client, err := storage.NewClient(ctx)
-	if err != nil {
-		log.Errorf("failed to create storage client (error: %s)", err)
-		outputChan <- outMap
-		return
-	}
-
-	rc, err := client.Bucket(path).Object("sysctl_a.txt").NewReader(ctx)
-	if err != nil {
-		log.Errorf("failed to open %s at %s (error:%s)", "sysctl_a.txt", path, err)
-		outputChan <- outMap
-		return
-	}
-
-	byteBuf, err := ioutil.ReadAll(rc)
-	if err != nil {
-		log.Errorf("failed to read sysctl file (error:%s)", err)
-		outputChan <- outMap
-		return
-	}
-	separator := " = "
-	for _, line := range strings.Split(string(byteBuf), "\n") {
-		parts := strings.Split(line, separator)
-		// no value for this parameter
-		if len(parts) == 1 {
-			outMap[parts[0]] = " "
-		} else {
-			// assume the parameter name is before the first separator.
-			outMap[parts[0]] = strings.Join(parts[1:], separator)
-		}
-	}
-	outputChan <- outMap
+	return
 }
 
 // Changelog generates a changelog between 2 build numbers
@@ -421,9 +324,6 @@
 //
 // The second changelog contains all commits that are present in the source build
 // but not present in the target build
-//
-// It also finds the sysctl value difference between two builds by comparing
-// sysctl files in GCS.
 func Changelog(httpClient *http.Client, source, target, host, repo, croslandURL string, querySize int) (map[string]*RepoLog, map[string]*RepoLog, utils.ChangelogError) {
 	if httpClient == nil {
 		log.Error("httpClient is nil")