Revert "Enable MobileFrontend on wikidata.org"

Pending a subdomain.

This reverts commit 7e86c9c4c0ec14ab96c9f4b55b69f9b59b036fa6.

Change-Id: I8a4152c082c4a0f5313f152130a615971eec186e
Merge "Revert "Enable MobileFrontend on wikidata.org""