Simplify list_iteritem

Author: markshannon

Objects/listobject.c

@@ -3917,26 +3917,9 @@ static PyObject *
 list_iteritem(PyObject *obj, Py_ssize_t *index)
 {
     Py_ssize_t i = *index;
-    if (i >= PyList_GET_SIZE(obj)) {
-        return NULL;
-    }
-#ifdef Py_GIL_DISABLED
-    assert(_Py_IsOwnedByCurrentThread(obj) ||
-           _PyObject_GC_IS_SHARED(obj));
-    PyObject *result;
-    int race = _PyList_GetItemRefNoLock((PyListObject *)obj, i, &result);
-    if (race < 0) {
-        // Slow path...
-        result = list_get_item_ref((PyListObject *)op, i);
-    }
+    PyObject *result = list_get_item_ref((PyListObject *)obj, i);
     *index = i+1;
     return result;
-#else
-    PyObject *result = PyList_GET_ITEM(obj, i);
-    Py_INCREF(result);
-    *index = i+1;
-    return result;
-#endif
 }
 
 static PyMappingMethods list_as_mapping = {