ERP5TypeTestCase.py: remove a no necessary self.commit().

product/ERP5Type/tests/ERP5TypeTestCase.py

@@ -963,8 +963,6 @@ class ERP5TypeCommandLineTestCase(ERP5TypeTestCaseMixin):
         for type_value in type_value_list:
           type_value.workflow_list = tuple(reversed(type_value.workflow_list))
 
-        self.commit()
-
     def setUpERP5Site(self,
                      business_template_list=(),
                      quiet=0,