tdf#97361 remove = None assignments in check_fields

Change-Id: I7696f28e6b35e79e98614b295c749adebf33878b
Reviewed-on: https://gerrit.libreoffice.org/31439Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

sw/qa/python/check_fields.py

@@ -3,8 +3,6 @@ from org.libreoffice.unotest import UnoInProcess
 
 
 class CheckFields(unittest.TestCase):
-    _uno = None
-    _xDoc = None
 
     @classmethod
     def setUpClass(cls):