Revert scan interval change in local calendar (home-assistant#146700)

Author: allenporter

homeassistant/components/local_calendar/calendar.py

@@ -36,11 +36,6 @@
 
 PRODID = "-//homeassistant.io//local_calendar 1.0//EN"
 
-# The calendar on disk is only changed when this entity is updated, so there
-# is no need to poll for changes. The calendar enttiy base class will handle
-# refreshing the entity state based on the start or end time of the event.
-SCAN_INTERVAL = timedelta(days=1)
-
 
 async def async_setup_entry(
     hass: HomeAssistant,