Added new method to remove entities efficently.

Ghost.Entities/Templates/EntityQuery.ComponentIterator.tt

@@ -55,7 +55,6 @@ public unsafe partial struct EntityQuery
             private readonly ReadOnlyUnsafeCollection<Identifier<Archetype>> _matchingArchetypes;
             private readonly EntityQueryMask _mask;
             private readonly World _world;
-            private readonly int _currentVersion;
 
             private readonly Stack.Scope _scope;
             private UnsafeList<int> _changedComponentIDs;