[CodeStyle][isort][F401] fix some regression issues (#48936)

* [CodeStyle][isort][F401] fix some regression issues

* add import paddle to fix eval call

python/paddle/distributed/auto_parallel/tuner/rule_based_tuner.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import math
-
 from abc import abstractmethod
+
 from ..graph import Graph
 
 _PATTERNS = {}

python/paddle/fluid/tests/unittests/test_device_guard.py

@@ -16,7 +16,6 @@ import unittest
 import warnings
 
 import paddle
-import paddle.fluid as fluid
 import paddle.fluid.core as core
 
 paddle.enable_static()

python/paddle/fluid/tests/unittests/xpu/test_device_guard_xpu.py

@@ -20,7 +20,6 @@ sys.path.append("..")
 import warnings
 
 import paddle
-import paddle.fluid as fluid
 import paddle.fluid.core as core
 
 paddle.enable_static()

python/paddle/utils/inplace_utils.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import warnings
-import paddle
-from paddle import _C_ops, _legacy_C_ops
+
+import paddle  # noqa: F401
 from paddle.fluid.framework import _non_static_mode
 from paddle.fluid.wrapped_decorator import wrap_decorator