Removed unused using directives.

OpenRA.Mods.Common/Scripting/Global/MapGlobal.cs

@@ -9,7 +9,6 @@
  */
 #endregion
 
-using System.Collections.Generic;
 using System.Linq;
 using Eluant;
 using OpenRA.Mods.Common.Traits;

OpenRA.Mods.Common/Scripting/Global/MediaGlobal.cs

@@ -14,7 +14,6 @@ using System.Drawing;
 using System.IO;
 using Eluant;
 using OpenRA.Effects;
-using OpenRA.FileSystem;
 using OpenRA.GameRules;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Effects;

OpenRA.Mods.Common/Scripting/Global/UtilsGlobal.cs

@@ -9,11 +9,9 @@
  */
 #endregion
 
-using System.Collections;
 using System.Linq;
 using Eluant;
 using OpenRA.Scripting;
-using OpenRA.Traits;
 using OpenRA.Widgets;
 
 namespace OpenRA.Mods.Common.Scripting