Remove unnecessary PY_VERSION_HEX check (PaddlePaddle#76358)

Author: co63oc

paddle/fluid/pybind/auto_parallel_py.cc

@@ -61,11 +61,7 @@ namespace py = pybind11;  // NOLINT
 namespace paddle::pybind {
 
 static bool PyCheckInteger(PyObject *obj) {
-#if PY_VERSION_HEX < 0x03000000
-  return (PyLong_Check(obj) || PyInt_Check(obj)) && !PyBool_Check(obj);
-#else
   return PyLong_Check(obj) && !PyBool_Check(obj);
-#endif
 }
 
 using paddle::distributed::auto_parallel::DistTensorSpec;

paddle/fluid/pybind/eager_math_op_patch.cc

@@ -56,11 +56,7 @@ using egr::InputsContainDistTensor;
 namespace paddle::pybind {
 
 static bool PyCheckInteger(PyObject* obj) {
-#if PY_VERSION_HEX < 0x03000000
-  return (PyLong_Check(obj) || PyInt_Check(obj)) && !PyBool_Check(obj);
-#else
   return PyLong_Check(obj) && !PyBool_Check(obj);
-#endif
 }
 
 static bool IsNumpyType(PyObject* obj) {

paddle/fluid/pybind/slice_utils.h

@@ -245,11 +245,7 @@ inline T GetDenseTensorValue(const phi::DenseTensor* x) {
 static Py_ssize_t GetSliceIndexFromPyObject(PyObject* obj);
 // Slice related methods
 static bool PyCheckInteger(PyObject* obj) {
-#if PY_VERSION_HEX < 0x03000000
-  return (PyLong_Check(obj) || PyInt_Check(obj)) && !PyBool_Check(obj);
-#else
   return PyLong_Check(obj) && !PyBool_Check(obj);
-#endif
 }
 
 static bool IsNumpyType(PyObject* obj) {