Remove unused variable

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/accounts/tests.py

@@ -860,7 +860,7 @@ class RemoveAcccountTest(ViewTestCase):
         )
 
     def test_removal_change(self):
-        response = self.edit_unit(
+        self.edit_unit(
             'Hello, world!\n',
             'Nazdar svete!\n'
         )