Remove old @rails/ujs patch

This avoids a spurious warning from `patch-package` about an out of date
patch successfully applying to `@rails/ujs`.

It seems that
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/124694 correctly
added a new patch for the new version 7.0.5-1, but did not delete the
patch for the old version, 7.0.5.