Updated mediawiki/extensions
Project: mediawiki/extensions/ZeroRatedMobileAccess  414b22e62835377e5806e606f2ed0910fb077d66

Minor code cleanups

* doc fixes
* redundant var decl
* consolidated some code into addWarning to reduce code size

Change-Id: I944b8527c68603f2c688f63964c18808642627f5