erp5_wendelin/testWendelin: Drop redundant code

As noted by @jm in nexedi/wendelin!160 (comment 199327)
'self.tic() automatically commits first'. So let's drop redundant code
in tests.

bt5/erp5_wendelin/TestTemplateItem/portal_components/test.erp5.testWendelin.py

@@ -590,7 +590,6 @@ class Test(ERP5TypeTestCase):
 
     self.assertNotEqual(ingestion_policy, None)
 
-    self.commit()
     self.tic()
 
     self.addCleanup(self._removeDocument, ingestion_policy)
@@ -750,7 +749,6 @@ result = [x for x in data_bucket_stream.getBucketIndexKeySequenceByIndex()]
     for data_analysis_title in data_analysis_title_list:
       self.assertEqual(getDataAnalysisByTitle(data_analysis_title), None)
 
-    self.commit()
     self.tic()
 
     self.portal.portal_alarms.wendelin_handle_analysis.activeSense()