Remove the dead ActorGroupProxy trait

OpenRA.Game/Actor.cs

@@ -45,7 +45,6 @@ namespace OpenRA
 
 		public Activity CurrentActivity { get; private set; }
 
-		public Group Group;
 		public int Generation;
 
 		public Rectangle Bounds { get; private set; }

OpenRA.Game/Group.cs

@@ -1,45 +0,0 @@
-#region Copyright & License Information
-/*
- * Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
- * This file is part of OpenRA, which is free software. It is made
- * available to you under the terms of the GNU General Public License
- * as published by the Free Software Foundation, either version 3 of
- * the License, or (at your option) any later version. For more
- * information, see COPYING.
- */
-#endregion
-
-using System.Collections.Generic;
-using System.Linq;
-
-namespace OpenRA
-{
-	public class Group
-	{
-		readonly Actor[] actors;
-		readonly int id;
-
-		static int nextGroup;
-
-		public IEnumerable<Actor> Actors { get { return actors; } }
-
-		public Group(IEnumerable<Actor> actors)
-		{
-			this.actors = actors.ToArray();
-
-			foreach (var a in actors)
-				a.Group = this;
-
-			id = nextGroup++;
-		}
-
-		public void Dump()
-		{
-			/* debug crap */
-			Game.Debug("Group #{0}: {1}".F(
-				id, actors.Select(a => "#{0} {1}".F(a.ActorID, a.Info.Name)).JoinWith(",")));
-		}
-
-		/* TODO: add lazy group path crap, groupleader, pruning, etc */
-	}
-}

OpenRA.Game/OpenRA.Game.csproj

@@ -124,7 +124,6 @@
     <Compile Include="Graphics\Util.cs" />
     <Compile Include="Graphics\Viewport.cs" />
     <Compile Include="Graphics\WorldRenderer.cs" />
-    <Compile Include="Group.cs" />
     <Compile Include="IUtilityCommand.cs" />
     <Compile Include="ModData.cs" />
     <Compile Include="Network\Connection.cs" />