remove unused classes

tree/assert_winner_state.py

-from threading import Timer
-
-class AssertWinnerState(object):
-    def GraftPruneState(self):
-        self._assert_state = AssertState.Winner
-        self._assert_timer = None
-        self._assert_winner_ip = None
-        self._assert_winner_metric = None
-
-    def set_assert_timer(self):
-        self.clear_assert_timer()
-        self._assert_timer= Timer()
-
-    def clear_assert_timer(self):
-        if self._assert_timer is not None:
-            self._assert_timer.cancel()

tree/graft_prune_state.py

-from threading import Timer
-
-class GraftPruneState(object):
-    def GraftPruneState(self):
-        self._prune_state = SFMRPruneState.DIP
-        self._prune_pending_timer = None # type: Timer
-        self._prune_timer = None # type: Timer
-
-    def set_prune_pending_timer(self):
-        self.clear_prune_pending_timer()
-        self._prune_pending_time = Timer()
-
-    def clear_prune_pending_timer(self):
-        if self._prune_pending_time is not None:
-            self._prune_pending_time.cancel()
-
-    def set_prune_timer(self):
-        self.clear_prune_timer()
-        self._prune_timer = Timer()
-
-    def clear_prune_timer(self):
-        if self._prune_timer is not None:
-            self._prune_timer.cancel()

tree/originator_state.py

-from threading import Timer
-
-class OriginatorState(object):
-    def OriginatorState(self):
-        self._source_active_timer = None # type: Timer
-        self._state_refresh_timer = None # type: Timer
-
-    def set_source_active_timer(self):
-        self.clear_source_active_timer()
-        self._source_active_timer = Timer()
-
-    def clear_source_active_timer(self):
-        if self._source_active_timer is not None:
-            self._source_active_timer.cancel()
-
-    def set_state_refresh_timer(self):
-        self.clear_state_refresh_timer()
-        self._state_refresh_timer = Timer()
-
-    def clear_state_refresh_timer(self):
-        if self._state_refresh_timer is not None:
-            self._state_refresh_timer.cancel()

tree/prune_state.py

-from threading import Timer
-
-class PruneState(object):
-    def PruneState(self):
-        self._prune_state = SFMRPruneState.DIP
-        self._prune_pending_timer = None
-        self._prune_timer = None
-
-    def set_prune_pending_timer(self):
-        self.clear_prune_pending_timer()
-        self._prune_pending_timer= Timer()
-
-    def clear_prune_pending_timer(self):
-        if self._prune_pending_timer is not None:
-            self._prune_pending_timer.cancel()
-
-    def set_prune_timer(self):
-        self.clear_prune_timer()
-        self._prune_timer= Timer()
-
-    def clear_prune_timer(self):
-        if self._prune_timer is not None:
-            self._prune_timer.cancel()