These checks were not functioning as intended. Notably tests were
skipped for today's hotfix release of Preview
[v0.169.2-pre](https://github.com/zed-industries/zed/actions/runs/12790602047):

Separately these checks were flawed as they would only be considered
"docs only" if the diff between the PR branch base and main also did not
have any subsequent non-docs changes.

Reverting until we can figure out something better.