去掉obi，使用自写绳索

Assets/Obi/Scripts/Common/Backends/Burst/Constraints/Pin/BurstPinConstraints.cs

@@ -1,41 +0,0 @@
-#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
-using System;
-using Unity.Jobs;
-
-namespace Obi
-{
-    public class BurstPinConstraints : BurstConstraintsImpl<BurstPinConstraintsBatch>
-    {
-        public BurstPinConstraints(BurstSolverImpl solver) : base(solver, Oni.ConstraintType.Pin)
-        {
-        }
-
-        public override IConstraintsBatchImpl CreateConstraintsBatch()
-        {
-            var dataBatch = new BurstPinConstraintsBatch(this);
-            batches.Add(dataBatch);
-            return dataBatch;
-        }
-
-        public override void RemoveBatch(IConstraintsBatchImpl batch)
-        {
-            batches.Remove(batch as BurstPinConstraintsBatch);
-            batch.Destroy();
-        }
-
-        public JobHandle ProjectRenderablePositions(JobHandle inputDeps)
-        {
-            for (int i = 0; i < batches.Count; ++i)
-            {
-                if (batches[i].enabled)
-                {
-                    inputDeps = batches[i].ProjectRenderablePositions(inputDeps);
-                    m_Solver.ScheduleBatchedJobsIfNeeded();
-                }
-            }
-
-            return inputDeps;
-        }
-    }
-}
-#endif