chore(grunt): revert f3c5d3f73ac970162185454553610cc19fa2d823 and
fb63ae25f0d3bd1b5990c1f88c3b4da7e0285a49 . Was causing broken
customizer.css, fixes https://github.com/HabitRPG/habitrpg/issues/2934
. cc @paglias