Merge view/init.mw.php into view/WikibaseView.php
Wikibase houses four virtual MediaWiki extensions:
- Wikibase Client (client/WikibaseClient.php)
- Wikibase Repo (repo/Wikibase.php)
- Wikibase Lib (lib/WikibaseLib.php)
- Wikibase View (view/WikibaseView.php)
However, in the case of Wikibase View, there was also a separate file
entry point "init.mw.php", which appears to have no added purpose.
This commit merges it into the main entry point, matching the way
the other three extensions are initialised.