Adjust type hints in rflink cover (#73946)

* Adjust type hints in rflink cover

* Move definition back to init

* Use attributes

* Revert "Use attributes"

This reverts commit ff4851015d.

* Use _attr_should_poll

homeassistant/components/rflink/__init__.py

@@ -1,4 +1,6 @@
 """Support for Rflink devices."""
+from __future__ import annotations
+
 import asyncio
 from collections import defaultdict
 import logging
@@ -315,8 +317,9 @@ class RflinkDevice(Entity):
     """
 
     platform = None
-    _state = None
+    _state: bool | None = None
     _available = True
+    _attr_should_poll = False
 
     def __init__(
         self,
@@ -369,11 +372,6 @@ class RflinkDevice(Entity):
         """Platform specific event handler."""
         raise NotImplementedError()
 
-    @property
-    def should_poll(self):
-        """No polling needed."""
-        return False
-
     @property
     def name(self):
         """Return a name for the device."""

homeassistant/components/rflink/cover.py

@@ -125,7 +125,7 @@ async def async_setup_platform(
 class RflinkCover(RflinkCommand, CoverEntity, RestoreEntity):
     """Rflink entity which can switch on/stop/off (eg: cover)."""
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Restore RFLink cover state (OPEN/CLOSE)."""
         await super().async_added_to_hass()
         if (old_state := await self.async_get_last_state()) is not None:
@@ -142,17 +142,12 @@ class RflinkCover(RflinkCommand, CoverEntity, RestoreEntity):
             self._state = False
 
     @property
-    def should_poll(self):
-        """No polling available in RFlink cover."""
-        return False
-
-    @property
-    def is_closed(self):
+    def is_closed(self) -> bool | None:
         """Return if the cover is closed."""
         return not self._state
 
     @property
-    def assumed_state(self):
+    def assumed_state(self) -> bool:
         """Return True because covers can be stopped midway."""
         return True