Move TileSize definition to terrain info.

OpenRA.Game/Map/MapGrid.cs

@@ -12,7 +12,6 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using OpenRA.Primitives;
 using OpenRA.Traits;
 
 namespace OpenRA
@@ -106,7 +105,6 @@ namespace OpenRA
 	public class MapGrid : IGlobalModData
 	{
 		public readonly MapGridType Type = MapGridType.Rectangular;
-		public readonly Size TileSize = new(24, 24);
 		public readonly byte MaximumTerrainHeight = 0;
 		public readonly SubCell DefaultSubCell = (SubCell)byte.MaxValue;
 

OpenRA.Game/Map/TerrainInfo.cs

@@ -25,6 +25,7 @@ namespace OpenRA
 	public interface ITerrainInfo
 	{
 		string Id { get; }
+		Size TileSize { get; }
 		TerrainTypeInfo[] TerrainTypes { get; }
 		TerrainTileInfo GetTerrainInfo(TerrainTile r);
 		bool TryGetTerrainInfo(TerrainTile r, out TerrainTileInfo info);