Remove linear_chain_crf_op.cu (#19645)

test=develop

paddle/fluid/operators/linear_chain_crf_op.cu

-/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License. */
-
-#include "paddle/fluid/operators/linear_chain_crf_op.h"
-
-namespace ops = paddle::operators;
-
-REGISTER_OP_CUDA_KERNEL(
-    linear_chain_crf,
-    ops::LinearChainCRFOpKernel<paddle::platform::CUDADeviceContext, float>,
-    ops::LinearChainCRFOpKernel<paddle::platform::CUDADeviceContext, double>);
-REGISTER_OP_CUDA_KERNEL(
-    linear_chain_crf_grad,
-    ops::LinearChainCRFGradOpKernel<paddle::platform::CUDADeviceContext, float>,
-    ops::LinearChainCRFGradOpKernel<paddle::platform::CUDADeviceContext,
-                                    double>);