Merge branch 'cwoolley-gitlab-master-patch-31936' into 'master'

Remove unused CSS .ide-merge-requests-dropdown

See merge request gitlab-org/gitlab!25965

app/assets/stylesheets/page_bundles/ide.scss

@@ -994,11 +994,6 @@ $ide-commit-header-height: 48px;
 }
 
 .ide-context-header {
-  .ide-merge-requests-dropdown.dropdown-menu {
-    width: 385px;
-    max-height: initial;
-  }
-
   .avatar-container {
     flex: 0 0 auto;
     margin-right: 0;