replace PlayMusicOnMapLoad trait with Lua Media.PlayMusic method

OpenRA.Mods.Common/Traits/World/PlayMusicOnMapLoad.cs

@@ -1,50 +0,0 @@
-#region Copyright & License Information
-/*
- * Copyright 2007-2015 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. For more information,
- * see COPYING.
- */
-#endregion
-
-using System;
-using OpenRA.Graphics;
-using OpenRA.Traits;
-
-namespace OpenRA.Mods.Common.Traits
-{
-	class PlayMusicOnMapLoadInfo : ITraitInfo
-	{
-		public readonly string Music = null;
-		public readonly bool Loop = false;
-
-		public object Create(ActorInitializer init) { return new PlayMusicOnMapLoad(init.World, this); }
-	}
-
-	class PlayMusicOnMapLoad : IWorldLoaded
-	{
-		readonly PlayMusicOnMapLoadInfo info;
-		readonly World world;
-
-		public PlayMusicOnMapLoad(World world, PlayMusicOnMapLoadInfo info)
-		{
-			this.world = world;
-			this.info = info;
-		}
-
-		public void WorldLoaded(World world, WorldRenderer wr)
-		{
-			PlayMusic();
-		}
-
-		void PlayMusic()
-		{
-			var onComplete = info.Loop ? (Action)PlayMusic : () => { };
-
-			if (Game.Settings.Sound.MapMusic &&
-				world.Map.Rules.Music.ContainsKey(info.Music))
-				Sound.PlayMusicThen(world.Map.Rules.Music[info.Music], onComplete);
-		}
-	}
-}