Updated mediawiki/extensions
Project: mediawiki/extensions/GettingStarted  608003ba9063023dacd3376bdbe5d31cf5b9c89f

Remove English Wikipedia-specific categories.

Production sets these in InitialiseSettings.php.

Also remove related obsolete/completed TODO.

Change-Id: I6064d26daedb2caf8adcfc78e878c8d87752b789