PR Close #26377
Mostly (but not exclusively) a follow-up to #23576. PR Close #25671
Since 808bd4af4, we are no longer pre-verifying PRs before uploading the build artifacts to the preview server, thus we no longer need the `travis-preverify-pr.sh` script or the `GITHUB_TEAM_MEMBERSHIP_CHECK_KEY` variable.
808bd4af4
aio-builds-setup