Use HTTP_OK constant (#33798)

* Use http ok constant

* Remove incorrect use

* Run isort

* Fix pylint by adding missing imports

* Fix pylint by fixing one import

homeassistant/components/startca/sensor.py

@@ -13,6 +13,7 @@ from homeassistant.const import (
     CONF_MONITORED_VARIABLES,
     CONF_NAME,
     DATA_GIGABYTES,
+    HTTP_OK,
     UNIT_PERCENTAGE,
 )
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -146,7 +147,7 @@ class StartcaData:
         url = f"https://www.start.ca/support/usage/api?key={self.api_key}"
         with async_timeout.timeout(REQUEST_TIMEOUT):
             req = await self.websession.get(url)
-        if req.status != 200:
+        if req.status != HTTP_OK:
             _LOGGER.error("Request failed with status: %u", req.status)
             return False