Remove unnecessary flush from recorder (#71910)

homeassistant/components/recorder/core.py

@@ -847,15 +847,14 @@ class Recorder(threading.Thread):
         assert self.event_session is not None
         self._commits_without_expire += 1
 
+        self.event_session.commit()
         if self._pending_expunge:
-            self.event_session.flush()
             for dbstate in self._pending_expunge:
                 # Expunge the state so its not expired
                 # until we use it later for dbstate.old_state
                 if dbstate in self.event_session:
                     self.event_session.expunge(dbstate)
             self._pending_expunge = []
-        self.event_session.commit()
 
         # We just committed the state attributes to the database
         # and we now know the attributes_ids.  We can save