[CodeStyle][F401] remove unused imports in unittests/ipu (#46791)

python/paddle/fluid/tests/unittests/ipu/test_fill_constant_op_ipu.py

@@ -14,7 +14,6 @@
 
 import unittest
 
-import numpy as np
 import paddle
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import IPUOpTest

python/paddle/fluid/tests/unittests/ipu/test_huber_loss_op_ipu.py

@@ -18,7 +18,6 @@ import numpy as np
 import paddle
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import IPUOpTest
-import paddle.nn.functional as F
 
 
 class TestBase(IPUOpTest):

python/paddle/fluid/tests/unittests/ipu/test_identity_loss_ipu.py

@@ -22,7 +22,6 @@ import paddle.optimizer
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import (IPUOpTest,
                                                           np_dtype_to_fluid_str)
-from paddle.utils.cpp_extension import load
 
 paddle.enable_static()
 

python/paddle/fluid/tests/unittests/ipu/test_kldiv_loss_op_ipu.py

@@ -18,7 +18,6 @@ import numpy as np
 import paddle
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import IPUOpTest
-import paddle.nn.functional as F
 
 
 class TestBase(IPUOpTest):

python/paddle/fluid/tests/unittests/ipu/test_sigmoid_cross_entropy_with_logits_op_ipu.py

@@ -18,7 +18,6 @@ import numpy as np
 import paddle
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import IPUOpTest
-import paddle.nn.functional as F
 
 
 class TestBase(IPUOpTest):

python/paddle/fluid/tests/unittests/ipu/test_warpctc_op_ipu.py

@@ -18,7 +18,6 @@ import numpy as np
 import paddle
 import paddle.static
 from paddle.fluid.tests.unittests.ipu.op_test_ipu import IPUOpTest
-import paddle.nn.functional as F
 
 
 class TestBase(IPUOpTest):