Test: Remove unused variables

The `debugdir` and `resultsdir` are not used in Avocado. They were
inherited from Avocado-vt, but there is no point in defining them in
Avocado itself as Avocado-vt creates them anyway.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

avocado/core/test.py

@@ -233,8 +233,6 @@ class Test(unittest.TestCase):
 
         self.log.info('START %s', self.name)
 
-        self.debugdir = None
-        self.resultsdir = None
         self.status = None
         self.fail_reason = None
         self.fail_class = None