headless: Update owners.

Change-Id: I32b5e7e37ff1b366a99de9ce5cd627ee5251490b
Reviewed-on: https://chromium-review.googlesource.com/1015900Reviewed-by: Alex Clarke <alexclarke@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551498}

headless/OWNERS

@@ -2,10 +2,11 @@ skyostil@chromium.org
 alexclarke@chromium.org
 altimin@chromium.org
 eseckler@chromium.org
+
+# Emeritus:
 dvallet@chromium.org
 irisu@chromium.org
 jzfeng@chromium.org
-rvera@chromium.org
 
 # TEAM: headless-dev@chromium.org
 # COMPONENT: Internals>Headless