Closes [rails/rails#46803][].

This reverts commit 67a4ac6c.

Once the system test helper test suite executes in CI, we can
re-introduce the changes as part of [rails/rails#46807][].

[rails/rails#46803]: https://github.com/rails/rails/issues/46803#issuecomment-1364112967
[rails/rails#46807]: https://github.com/rails/rails/pull/46807