Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  d9e3f4f7c6ec6454d2f84d2ed1da9b25a9e3380f

General Wikibase API code cleanup

* Remove one unused property.
* Add missing type hints to constructors.
* Use same variable names in all constructors.
* Use same inline documentation for all constructors.

Change-Id: If3c26d75ec65c3243eceeec376453651377e06cb