Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  c2b47de1ce04f2e20497ae909dc173be81ee2053

Hygiene: Remove unused talk-Template

talkHeader.hogan isn't used anymore (standard Overlay header used
now) -> remove.

Change-Id: I07db92286b27bb1c467be8c5ba8d815eacf79bfc