Remove unused review-actions-visibility from editors tools (bug 1112615)

Fixes [bug 1112615](https://bugzilla.mozilla.org/show_bug.cgi?id=1112615)

This follows up from
https://github.com/mozilla/olympia/commit/f9464093504f2d820d84a58576da1c0216ec9f88
when this visibility feature was removed. This removed code was breaking the
javascript.