Improve Squid Charm code

Remove unnecesary code in charm.py for a simpler
example.

Signed-off-by: Dominik Fleischmann <dominik.fleischmann@canonical.com>

magma/hackfest_squid_cnf/charms/squid/src/charm.py

@@ -65,7 +65,6 @@ class SquidK8SCharm(CharmBase):
 
         if not self.state.installed:
             logging.warning("Config changed called before install complete, deferring event: {}.".format(event.handle))
-            self._defer_once(event)
 
             return
 
@@ -81,7 +80,6 @@ class SquidK8SCharm(CharmBase):
 
         if not self.state.configured:
             logging.warning("Start called before configuration complete, deferring event: {}".format(event.handle))
-            self._defer_once(event)
 
             return
         self.unit.status = MaintenanceStatus("Applying pod spec")
@@ -93,28 +91,6 @@ class SquidK8SCharm(CharmBase):
         self.state.started = True
         logging.info("Started")
 
-    def _defer_once(self, event):
-        """Defer the given event, but only once."""
-        notice_count = 0
-        handle = str(event.handle)
-
-        for event_path, _, _ in self.framework._storage.notices(None):
-            if event_path.startswith(handle.split('[')[0]):
-                notice_count += 1
-                logging.debug("Found event: {} x {}".format(event_path, notice_count))
-
-        if notice_count > 1:
-            logging.debug("Not deferring {} notice count of {}".format(handle, notice_count))
-        else:
-            logging.debug("Deferring {} notice count of {}".format(handle, notice_count))
-            event.defer()
-
-    def on_addconfig_action(self, event):
-        """Handle the example_action action."""
-        event.log("Hello from the example action.")
-        event.set_results({"success": "true"})
-
-
 if __name__ == "__main__":
     from ops.main import main
     main(SquidK8SCharm)