Remove duplicated index from merge_requests
What does this MR do and why?
Remove duplicated index from merge_requests
Removes index_merge_requests_on_author_id as it's already covered by other indexes
The index is being covered by:
- index_merge_requests_on_author_id_and_created_at
- index_merge_requests_on_author_id_and_id
- index_merge_requests_on_author_id_and_target_project_id
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
Related to #428560 (closed)
Edited by Leonardo da Rosa