Merge branch 'aa-remove-concurrent-index-by-name-bug' into 'master'

Fix remove_concurrent_index_by_name argument issue

See merge request gitlab-org/gitlab!36029

db/post_migrate/20200609002841_add_partial_index_on_locked_state_id_to_merge_requests.rb

@@ -14,6 +14,6 @@ class AddPartialIndexOnLockedStateIdToMergeRequests < ActiveRecord::Migration[6.
   end
 
   def down
-    remove_concurrent_index_by_name :merge_requests, name: INDEX_NAME
+    remove_concurrent_index_by_name :merge_requests, INDEX_NAME
   end
 end