Excise previous server extensions code

OpenRA.Game/World.cs

@@ -199,11 +199,7 @@ namespace OpenRA
 
 				// hash all the traits that tick
 				foreach (var x in traitDict.ActorsWithTraitMultiple<object>(this))
-				{
-					if (x.Trait is ITraitNotSynced) continue;
-
 					ret += n++*(int) x.Actor.ActorID*Sync.CalculateSyncHash(x.Trait);
-				}
 
 				// Hash the shared rng
 				ret += SharedRandom.Last;