Remove AttackBase.IgnoresVisibility.

This was a workaround for D2K sandworms, which is
now implemented using a custom attack activity.

OpenRA.Mods.Common/UpdateRules/UpdatePath.cs

@@ -110,6 +110,7 @@ namespace OpenRA.Mods.Common.UpdateRules
 				new RemoveResourceExplodeModifier(),
 				new DefineLevelUpImageDefault(),
 				new RemovedAutoCarryallCircleTurnSpeed(),
+				new RemoveAttackIgnoresVisibility(),
 			})
 		};