Remove unused import (#30858)

homeassistant/components/ring/binary_sensor.py

@@ -1,5 +1,5 @@
 """This component provides HA sensor support for Ring Door Bell/Chimes."""
-from datetime import datetime, timedelta
+from datetime import datetime
 import logging
 
 from homeassistant.components.binary_sensor import BinarySensorDevice
@@ -10,8 +10,6 @@ from .entity import RingEntityMixin
 
 _LOGGER = logging.getLogger(__name__)
 
-SCAN_INTERVAL = timedelta(seconds=10)
-
 # Sensor types: Name, category, device_class
 SENSOR_TYPES = {
     "ding": ["Ding", ["doorbots", "authorized_doorbots"], "occupancy"],