Updated mediawiki/extensions
Project: mediawiki/extensions/ConfirmEdit  2f605185fd91a2b770eef71fe6ae4c9a1aad0b0f

Use PHP's built-in class_exists instead of MWInit::classExists

MWInit::classExists is deprecated as of 1.22 in favor of the
class_exists PHP built-in.

Change-Id: Ia51ac62c10c8191f00232f709d4d4df295583354