remove unnecessary tensor copy in save op

Author: kexinzhao

paddle/fluid/operators/load_op.cc

@@ -46,19 +46,6 @@ class LoadOp : public framework::OperatorBase {
     auto *tensor = out_var->GetMutable<framework::LoDTensor>();
 
     DeserializeFromStream(fin, tensor, *dev_ctx);
-
-    if (platform::is_gpu_place(place)) {
-      // copy CPU to GPU
-      framework::LoDTensor cpu_tensor;
-      cpu_tensor.ShareDataWith(*tensor);
-      cpu_tensor.set_lod(tensor->lod());
-
-      // reset tensor
-      out_var->Clear();
-      tensor = out_var->GetMutable<framework::LoDTensor>();
-      tensor->set_lod(cpu_tensor.lod());
-      TensorCopy(cpu_tensor, place, *dev_ctx, tensor);
-    }
   }
 };