Use _attr_** in slide (#62206)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/slide/cover.py

@@ -4,10 +4,10 @@ import logging
 
 from homeassistant.components.cover import (
     ATTR_POSITION,
-    DEVICE_CLASS_CURTAIN,
     STATE_CLOSED,
     STATE_CLOSING,
     STATE_OPENING,
+    CoverDeviceClass,
     CoverEntity,
 )
 from homeassistant.const import ATTR_ID
@@ -35,30 +35,19 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 class SlideCover(CoverEntity):
     """Representation of a Slide cover."""
 
+    _attr_assumed_state = True
+    _attr_device_class = CoverDeviceClass.CURTAIN
+
     def __init__(self, api, slide):
         """Initialize the cover."""
         self._api = api
         self._slide = slide
         self._id = slide["id"]
-        self._unique_id = slide["mac"]
-        self._name = slide["name"]
+        self._attr_extra_state_attributes = {ATTR_ID: self._id}
+        self._attr_unique_id = slide["mac"]
+        self._attr_name = slide["name"]
         self._invert = slide["invert"]
 
-    @property
-    def unique_id(self):
-        """Return the device unique id."""
-        return self._unique_id
-
-    @property
-    def name(self):
-        """Return the device name."""
-        return self._name
-
-    @property
-    def extra_state_attributes(self):
-        """Return device specific state attributes."""
-        return {ATTR_ID: self._id}
-
     @property
     def is_opening(self):
         """Return if the cover is opening or not."""
@@ -81,16 +70,6 @@ class SlideCover(CoverEntity):
         """Return False if state is not available."""
         return self._slide["online"]
 
-    @property
-    def assumed_state(self):
-        """Let HA know the integration is assumed state."""
-        return True
-
-    @property
-    def device_class(self):
-        """Return the device class of the cover."""
-        return DEVICE_CLASS_CURTAIN
-
     @property
     def current_cover_position(self):
         """Return the current position of cover shutter."""