Updated mediawiki/extensions/Wikidata
Project: mediawiki/extensions/Wikibase  b184fe5d8e4d4f1040a32cade28fa47586cab74b

Remove outdated and superfluous pieces of documentation

These aren't useful anymore and might be confusing.

Change-Id: Ice9688f6d25f2410b2a04ccd48aae78acd953f19