refactoring and proper game state destruction

Torch.API/ModAPI/Ingame/GridExtensions.cs

@@ -1,14 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Sandbox.Game.Entities.Blocks;
-using Sandbox.ModAPI.Ingame;
-using VRage.Game.ModAPI.Ingame;
-
-namespace Torch.API.ModAPI.Ingame
+namespace Torch.API.ModAPI.Ingame
 {
     public static class GridExtensions
     {