Clean up AsusWRT if check (#54896)

homeassistant/components/asuswrt/config_flow.py

@@ -49,12 +49,7 @@ _LOGGER = logging.getLogger(__name__)
 def _is_file(value) -> bool:
     """Validate that the value is an existing file."""
     file_in = os.path.expanduser(str(value))
-
-    if not os.path.isfile(file_in):
-        return False
-    if not os.access(file_in, os.R_OK):
-        return False
-    return True
+    return os.path.isfile(file_in) and os.access(file_in, os.R_OK)
 
 
 def _get_ip(host):

homeassistant/components/asuswrt/sensor.py

@@ -161,7 +161,6 @@ class AsusWrtSensor(CoordinatorEntity, SensorEntity):
         """Return current state."""
         descr = self.entity_description
         state = self.coordinator.data.get(descr.key)
-        if state is not None:
-            if descr.factor and isinstance(state, Number):
-                return round(state / descr.factor, descr.precision)
+        if state is not None and descr.factor and isinstance(state, Number):
+            return round(state / descr.factor, descr.precision)
         return state