Remove redundant ISync and ITick from Attack* traits

ISync is implemented by AttackBase, so there's no need for other Attack traits to implement it again.
AttackTurreted inherits AttackFollow, which already implements ITick.

OpenRA.Mods.Common/Traits/Attack/AttackCharge.cs

@@ -35,7 +35,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new AttackCharge(init.Self, this); }
 	}
 
-	class AttackCharge : AttackOmni, ITick, INotifyAttack, ISync
+	class AttackCharge : AttackOmni, ITick, INotifyAttack
 	{
 		readonly AttackChargeInfo info;