[Flow202][keyserver][skip-ci] [6/x] Delete some old scripts that haven't been used in a while
Summary:
All of these scripts have type errors in the new version of Flow, and I'd rather remove them from the codebase than bother fixing them.
Three of these are ancient migrations from before we had a migration system on keyserver. One of them is an ancient script I don't remember creating.
NOTE: CI will fail on this diff. I considered the possibility of fixing Flow errors BEFORE upgrading Flow, but it wasn't possible... in some cases, the fixes to support the new version of Flow caused errors in the old version. I could have hidden these type errors with $FlowFixMe lines and then later revert those, but that seemed like too much busy work.
Depends on D9853
Test Plan: Confirm the Flow errors go away
Reviewers: atul
Reviewed By: atul
Subscribers: tomek
Differential Revision: https://phab.comm.dev/D9854