Merge pull request #4049 from Mailaender/make-docs-fix

Fixed make docs for downstream packagers

OpenRA.Utility/Command.cs

@@ -338,11 +338,6 @@ namespace OpenRA.Utility
 		public static void ExtractTraitDocs(string[] args)
 		{
 			Game.modData = new ModData(args[1]);
-
-			FileSystem.UnmountAll();
-			foreach (var dir in Game.modData.Manifest.Folders)
-				FileSystem.Mount(dir);
-
 			Rules.LoadRules(Game.modData.Manifest, new Map());
 
 			Console.WriteLine("## Documentation");