Revert "Only force $wgInternalTidy = false on production"

Segfaults on labs. https://phabricator.wikimedia.org/P120

This reverts commit ca2541532120556d0b9dce084fe8b50366c5c1ea.

Change-Id: Iac0086e3ec55f46cf6a0dfa6b176c4b8c9d19492