Updated LazyManyObjectsResolverBase to support removal. Moves cache refreshers to proper namespace and obsoletes old ones. Obsoletes

a couple of library cache clearing methods and moves them to CacheHelperExtensions. Fixes #U4-1653 for 6.1 and updates ExamineEvents to
ensure that Examine re-indexes media on all of the correct events (including Trashed). Changes for Caching are being done to begin work with
CD-148

src/Umbraco.Core/ObjectResolution/ApplicationEventsResolver.cs

@@ -39,10 +39,5 @@ namespace Umbraco.Core.ObjectResolution
 			get { return false; }			
 		}
 
-		protected override bool SupportsRemove
-		{
-			get { return false; }
-		}
-
 	}
 }