LAKITU: Do not set 'internal' USE flag in sdk

Our chromeos-overlay is empty, and setting the internal USE flag
introduces dependencies on packages in that overlay that we do not have.
Let's unset this USE flag.

BUG=b/181107534
TEST=presubmit
RELEASE_NOTE=None

Change-Id: If9d342f6d36caa812c065a6bd9679b5e82f4db25
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/13111
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/chromeos/config/make.conf.sdk-chromeos b/chromeos/config/make.conf.sdk-chromeos
index 17695c3..959e930 100644
--- a/chromeos/config/make.conf.sdk-chromeos
+++ b/chromeos/config/make.conf.sdk-chromeos
@@ -8,7 +8,9 @@
 # See "man 5 make.conf" and "man 5 portage" for the available options.
 
 # TODO: Drop this!
-USE="${USE} internal"
+# lakitu: Do not set the internal USE flag, because we don't need it (our
+# chromeos-overlay is empty)
+# USE="${USE} internal"
 
 # For internal builds, automatically accept the licenses needed to
 # build Chrome OS.  All Googlers have agreed to this.