Kill ITerrainTypeModifier for explicit updating of a custom layer in the map. Functionally equivalent, but MUCH faster.

OpenRA.Mods.RA/BridgeLayer.cs

@@ -22,7 +22,7 @@ namespace OpenRA.Mods.RA
 		public object Create(ActorInitializer init) { return new BridgeLayer(init.self, this); }
 	}
 
-	class BridgeLayer : ILoadWorldHook, ITerrainTypeModifier
+	class BridgeLayer : ILoadWorldHook
 	{
 		readonly BridgeLayerInfo Info;
 		readonly World world;
@@ -106,13 +106,6 @@ namespace OpenRA.Mods.RA
 			bridge.Create(tile, subTiles);
 		}
 		
-		public string GetTerrainType(int2 cell)
-		{
-			if (Bridges[ cell.X, cell.Y ] != null)
-				return Bridges[ cell.X, cell.Y ].GetTerrainType(cell);
-			return null;
-		}
-		
 		// Used to check for neighbouring bridges
 		public Bridge GetBridge(int2 cell)
 		{