Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  a2d58b5d35d25c7340eb4a81d6fd2ec9bd9d7871
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Removes unneeded MobileContext::checkUserLoggedIn()

This appears to have been introduced a bagillion years ago (like
back in the days of SVN) and was related to ancient attempts to
implement mobile login. It is currently not used for anything,
so it and its invocation have been removed.

Change-Id: Ifd31b202ad08faba69399182f39bc0931e55efa9