message: Call Unref instead of delete in TF_DeleteAbstractFunction since AbstractFunction is now RefCounted.
diff: @@ -236,7 +236,7 @@ void TF_ExecuteOperation(TF_AbstractOp* op, int num_inputs,
  }
  void TF_DeleteAbstractFunction(TF_AbstractFunction* func) {
  - delete unwrap(func);
  + unwrap(func)->Unref();
  }
  void TF_ExecutionContextRegisterFunction(TF_ExecutionContext* ctx,
  