Merge pull request #4305 from littletomatodonkey/dyg/rm_usused_import

rm unused import

ppocr/modeling/backbones/rec_mv1_enhance.py

-# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
+# copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,26 +16,17 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
-import numpy as np
-import paddle
-from paddle import ParamAttr
-import paddle.nn as nn
-import paddle.nn.functional as F
-from paddle.nn import Conv2D, BatchNorm, Linear, Dropout
-from paddle.nn import AdaptiveAvgPool2D, MaxPool2D, AvgPool2D
-from paddle.nn.initializer import KaimingNormal
 import math
 import numpy as np
 import paddle
-from paddle import ParamAttr, reshape, transpose, concat, split
+from paddle import ParamAttr, reshape, transpose
 import paddle.nn as nn
 import paddle.nn.functional as F
 from paddle.nn import Conv2D, BatchNorm, Linear, Dropout
 from paddle.nn import AdaptiveAvgPool2D, MaxPool2D, AvgPool2D
 from paddle.nn.initializer import KaimingNormal
-import math
-from paddle.nn.functional import hardswish, hardsigmoid
 from paddle.regularizer import L2Decay
+from paddle.nn.functional import hardswish, hardsigmoid
 
 
 class ConvBNLayer(nn.Layer):