Removed site link scraping from entityViewInit

requires WikibaseSerializationJavaScript 1.1.2

Change-Id: Ia0b75c75fce5b7a94df846bc86489b4651dbb048
Optimized jQuery.wikibase.sitelinkview.isInitialValue

requires WikibaseSerializationJavaScript 1.1.2

Change-Id: I5bf1a8f7a751c5c73ce9370b9c583b3ca4fdb9c0