Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  ea6750063393f5e6590312b8c8deb349a9cfa918

remove composer autoload point

not used by travis or anywhere afaik and doesn't work without
also specifying some settings.

better for the user to more explicitly handle what they load.

Change-Id: Ica60771a03892f5d53d4ae0161486b0c600986bb