R1:02933acbd5ae

Remove all application callers to "putInSet()"

Summary: Ref T13218. This is the last public-facing API call for `loadRelatives/loadOneRelative`. This just "primed" objects to make the other calls work and had no direct effects.

Test Plan:
- Ran `bin/fact analyze`.
- Used `bin/storage upgrade -f --apply` to apply `20181031.board.01.queryreset.php`, which uses `LiskMigrationIterator`.
- Browsed user list.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: yelirekim

Maniphest Tasks: T13218…