Use relative imports [S-Z] (#61576)

homeassistant/components/unifi/controller.py

@@ -26,7 +26,6 @@ from aiounifi.events import (
 from aiounifi.websocket import STATE_DISCONNECTED, STATE_RUNNING
 import async_timeout
 
-from homeassistant.components.unifi.switch import BLOCK_SWITCH, POE_SWITCH
 from homeassistant.const import (
     CONF_HOST,
     CONF_PASSWORD,
@@ -70,6 +69,7 @@ from .const import (
     UNIFI_WIRELESS_CLIENTS,
 )
 from .errors import AuthenticationRequired, CannotConnect
+from .switch import BLOCK_SWITCH, POE_SWITCH
 
 RETRY_TIMER = 15
 CHECK_HEARTBEAT_INTERVAL = timedelta(seconds=1)