去掉obi，使用自写绳索

Assets/Obi/Scripts/Common/Backends/Burst/BurstBackend.cs

@@ -1,26 +0,0 @@
-#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
-using UnityEngine;
-using Unity.Jobs;
-using Unity.Mathematics;
-using Unity.Collections;
-using System;
-using System.Collections;
-
-namespace Obi
-{
-    public class BurstBackend : IObiBackend
-    {
-        #region Solver
-        public ISolverImpl CreateSolver(ObiSolver solver, int capacity)
-        {
-            return new BurstSolverImpl(solver);
-        }
-        public void DestroySolver(ISolverImpl  solver)
-        {
-            if (solver != null)
-                solver.Destroy();
-        }
-        #endregion
-    }
-}
-#endif