Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaEvents  3c91344cb1a7b7ceafaeaf3bba30d389e49d1f0a

Actually unset the HHVM cookie

Fix-up for Ied71b5032.

Change-Id: I4adffaa26ba6020d51606155d9fc4b8c24badce6