Update CHANGELOG

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CHANGELOG

@@ -4,7 +4,6 @@ v 8.1.4
   - Fix bug where manually merged branches in a MR would end up with an empty diff (Stan Hu)
   - Prevent redirect loop when home_page_url is set to the root URL
   - Fix incoming email config defaults
-  - Make color of "Accept Merge Request" button consistent with current build status
   - Remove CSS property preventing hard tabs from rendering in Chromium 45 (Stan Hu)
 v 8.1.3