Delete check for build creators on trusted workers
Delete check for build creators on trusted workers

If the release was cut at a commit from a Non-Googler, this check fails since Buildkite sets BUILDKITE_BUILD_CREATOR_EMAIL to the address of the author.

This change is a temporary workaround for https://github.com/bazelbuild/continuous-integration/issues/281
We should re-evaluate whether the check is really needed and, if so, bring it back in a modified form.
bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration