fix python module not found bug (#47438)

* fix python module not found bug

* delete unused cast,test=allcases

paddle/scripts/paddle_build.sh

@@ -2857,7 +2857,6 @@ function parallel_test() {
     cd ${PADDLE_ROOT}/build
     pip install hypothesis
     pip install ${PADDLE_ROOT}/build/python/dist/*whl
-    cp ${PADDLE_ROOT}/build/python/paddle/fluid/tests/unittests/op_test.py ${PADDLE_ROOT}/build/python
     cp ${PADDLE_ROOT}/build/python/paddle/fluid/tests/unittests/testsuite.py ${PADDLE_ROOT}/build/python
     cp -r ${PADDLE_ROOT}/build/python/paddle/fluid/tests/unittests/white_list ${PADDLE_ROOT}/build/python
     ut_total_startTime_s=`date +%s`

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

@@ -18,9 +18,8 @@
 
 import os
 
-if os.name == 'nt':
-    import sys
+import sys
 
-    dirname, filename = os.path.split(os.path.abspath(__file__))
-    sys.path.insert(0, dirname)
-    print(sys.path)
+dirname, filename = os.path.split(os.path.abspath(__file__))
+sys.path.insert(0, dirname)
+print(sys.path)