Remove legacy tag rendering.

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -35,7 +35,6 @@ namespace OpenRA.Traits
 
 	// depends on the order of pips in WorldRenderer.cs!
 	public enum PipType { Transparent, Green, Yellow, Red, Gray, Blue, Ammo, AmmoEmpty }
-	public enum TagType { None }
 
 	[Flags]
 	public enum Stance
@@ -250,7 +249,6 @@ namespace OpenRA.Traits
 	public interface ILoadsPlayerPalettes { void LoadPlayerPalettes(WorldRenderer wr, string playerName, HSLColor playerColor, bool replaceExisting); }
 	public interface IPaletteModifier { void AdjustPalette(IReadOnlyDictionary<string, MutablePalette> b); }
 	public interface IPips { IEnumerable<PipType> GetPips(Actor self); }
-	public interface ITags { IEnumerable<TagType> GetTags(); }
 	public interface ISelectionBar { float GetValue(); Color GetColor(); }
 
 	public interface IPositionableInfo : ITraitInfo { }