[CodeStyle][F401] remove unused imports in fluid/tests/test_*, book (#46716)

python/paddle/fluid/tests/book/notest_understand_sentiment.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from paddle.fluid.layers.device import get_places
 import unittest
 import paddle.fluid as fluid
 import paddle

python/paddle/fluid/tests/book/test_image_classification.py

@@ -21,7 +21,6 @@ import numpy
 import unittest
 import os
 import tempfile
-import numpy as np
 
 paddle.enable_static()
 

python/paddle/fluid/tests/book/test_label_semantic_roles.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 import contextlib
-import math
 import numpy as np
 import os
 import time

python/paddle/fluid/tests/book/test_recognize_digits.py

@@ -22,7 +22,6 @@ import numpy
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid.layers.device import get_places
 
 paddle.enable_static()
 

python/paddle/fluid/tests/book/test_rnn_encoder_decoder.py

@@ -15,9 +15,7 @@
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.core as core
 import paddle.fluid.framework as framework
-import paddle.fluid.layers as layers
 import contextlib
 import math
 import sys

python/paddle/fluid/tests/book/test_word2vec_book.py

@@ -14,7 +14,6 @@
 
 import paddle
 import paddle.fluid as fluid
-from paddle.fluid.layers.device import get_places
 import unittest
 import os
 import numpy as np

python/paddle/fluid/tests/test_beam_search_decoder.py

@@ -19,13 +19,11 @@ import contextlib
 import numpy as np
 import paddle
 import paddle.fluid as fluid
-import paddle.fluid.core as core
 import paddle.fluid.framework as framework
 import paddle.fluid.layers as layers
 from paddle.fluid.executor import Executor
 from paddle.fluid.contrib.decoder.beam_search_decoder import *
 import unittest
-import os
 
 paddle.enable_static()
 

python/paddle/fluid/tests/test_error_clip.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import numpy as np
 import paddle
 import paddle.fluid as fluid