Drop unused issues indexes synchronously
What does this MR do and why?
These indexes were already dropped async on GitLab.com
References
Related to #538901 (closed)
MRs that dropped the indexes async:
MR acceptance checklist
Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Edited by Heinrich Lee Yu