Adjust type hints in sensor group (home-assistant#157373)

Author: emontnemery

homeassistant/components/group/sensor.py

@@ -53,7 +53,7 @@
     async_create_issue,
     async_delete_issue,
 )
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, StateType
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from .const import CONF_IGNORE_NON_NUMERIC, DOMAIN
 from .entity import GroupEntity
@@ -374,7 +374,7 @@ def calculate_state_attributes(self, valid_state_entities: list[str]) -> None:
     def async_update_group_state(self) -> None:
         """Query all members and determine the sensor group state."""
         self.calculate_state_attributes(self._get_valid_entities())
-        states: list[StateType] = []
+        states: list[str] = []
         valid_units = self._valid_units
         valid_states: list[bool] = []
         sensor_values: list[tuple[str, float, State]] = []