update docs dtype(core.VarDesc.VarType)test=document_fix (#40947)

* update docs dtype(core.VarDesc.VarType)

* fix code style, test=document_fix

fix code style, test=document_fix
Co-authored-by: NChen Long <1300851984@qq.com>

python/paddle/fluid/contrib/layers/nn.py

-# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+# Copyright (c) 2022 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.
@@ -11,20 +11,6 @@
 # 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.
-
-# Copyright(c) 2019 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.
 """
 Contrib layers just related to the neural network.
 """
@@ -1050,7 +1036,7 @@ def sparse_embedding(input,
             vectors can be loaded with the :attr:`param_attr` parameter. The local word vector needs 
             to be transformed into numpy format, and the shape of local word vector should be consistent 
             with :attr:`size` .
-        dtype(str|core.VarDesc.VarType): It refers to the data type of output Tensor. It must be float32 or 
+        dtype(str): It refers to the data type of output Tensor. It must be float32 or 
             float64. Default: float32.
             
     Returns:

python/paddle/fluid/input.py

-#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#   Copyright (c) 2022 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.
@@ -214,7 +214,7 @@ def embedding(input,
             user-defined or pre-trained word vectors can be loaded with the :attr:`param_attr` parameter. 
             The local word vector needs to be transformed into numpy format, and the shape of local word
             vector should be consistent with :attr:`size` .
-        dtype(str|core.VarDesc.VarType): It refers to the data type of output Tensor.
+        dtype(str): It refers to the data type of output Tensor.
             It must be float32 or float64. Default: float32.
 
     Returns:

python/paddle/fluid/layers/tensor.py

-#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#   Copyright (c) 2022 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.
@@ -229,7 +229,7 @@ def cast(x, dtype):
     Args:
         x(Tensor): An input N-D Tensor with data type bool, float16,
             float32, float64, int32, int64, uint8.
-        dtype(np.dtype|core.VarDesc.VarType|str): Data type of the output:
+        dtype(np.dtype|str): Data type of the output:
             bool, float16, float32, float64, int8, int32, int64, uint8.
 
     Returns:

python/paddle/tensor/creation.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#   Copyright (c) 2022 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.
@@ -512,7 +512,7 @@ def arange(start=0, end=None, step=1, dtype=None, name=None):
             it is the istance between two adjacent values, out[i+1] - out[i].
             If ``step`` is a Tensor, it is a 1-D Tensor with shape [1], with
             data type int32, int64, float32, float64. Default is 1.
-        dtype(str|np.dtype|core.VarDesc.VarType, optional): The data type of the
+        dtype(str|np.dtype, optional): The data type of the
             output tensor. Supported data types: int32, int64, float32, float64.
             If ``dytpe`` is None, the data type is float32. Default is None.
         name(str, optional): The default value is None. Normally there is no