layout.conf: set repo-name

We want to drop repo_name support, so move it to layout.conf.

BUG=chromium:386495
TEST=`cbuildbot chromiumos-sdk` passes
TEST=pre-cq passes; tree doesn't burn down

Change-Id: I63bacc619b947fe218c92bb10c265fd5adaa380a
Reviewed-on: https://chromium-review.googlesource.com/227263
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/metadata/layout.conf b/metadata/layout.conf
index 4e25ee7..580629f 100644
--- a/metadata/layout.conf
+++ b/metadata/layout.conf
@@ -1,5 +1,6 @@
-profile-formats = portage-2
+cache-format = md5-dict
 masters =
+profile-formats = portage-2
+repo-name = eclass-overlay
 thin-manifests = true
 use-manifests = true
-cache-format = md5-dict
diff --git a/profiles/repo_name b/profiles/repo_name
deleted file mode 100644
index 4910e97..0000000
--- a/profiles/repo_name
+++ /dev/null
@@ -1 +0,0 @@
-eclass-overlay