RTC test: fix __result variable

Not needed, neither used anywhere. Teardown also can
be removed

Author: 0xc0170

TESTS/host_tests/rtc_calc_auto.py

@@ -130,9 +130,3 @@ def _verify_timestamp(self, key, value, timestamp):
     def setup(self):
         self.register_callback('timestamp', self._verify_timestamp)
         self.register_callback('leap_year_setup', self._set_leap_year_support)
-
-    def result(self):
-        return self.__result
-
-    def teardown(self):
-        pass