Revert "Enable CentralNotice CrossWiki Hiding"

Still uncached and causing problems.

This reverts commit 816786031ec5b9f42d8311c60bc7203c955fa564.

Change-Id: If74ba5a52ae373b774e33112a8fced31a42c3a7c
Merge "Revert "Enable CentralNotice CrossWiki Hiding""