Small code cleanup: (#12409)

- should_poll of base class already returns False
- there is no is_on within Scene

homeassistant/components/scene/litejet.py

@@ -42,11 +42,6 @@ class LiteJetScene(Scene):
         """Return the name of the scene."""
         return self._name
 
-    @property
-    def should_poll(self):
-        """Return that polling is not necessary."""
-        return False
-
     @property
     def device_state_attributes(self):
         """Return the device-specific state attributes."""

homeassistant/components/scene/lutron_caseta.py

@@ -42,16 +42,6 @@ class LutronCasetaScene(Scene):
         """Return the name of the scene."""
         return self._scene_name
 
-    @property
-    def should_poll(self):
-        """Return that polling is not necessary."""
-        return False
-
-    @property
-    def is_on(self):
-        """There is no way of detecting if a scene is active (yet)."""
-        return False
-
     @asyncio.coroutine
     def async_activate(self):
         """Activate the scene."""

homeassistant/components/scene/vera.py

@@ -53,8 +53,3 @@ class VeraScene(Scene):
     def device_state_attributes(self):
         """Return the state attributes of the scene."""
         return {'vera_scene_id': self.vera_scene.vera_scene_id}
-
-    @property
-    def should_poll(self):
-        """Return that polling is not necessary."""
-        return False

homeassistant/components/scene/wink.py

@@ -38,11 +38,6 @@ class WinkScene(WinkDevice, Scene):
         """Call when entity is added to hass."""
         self.hass.data[DOMAIN]['entities']['scene'].append(self)
 
-    @property
-    def is_on(self):
-        """Python-wink will always return False."""
-        return self.wink.state()
-
     def activate(self):
         """Activate the scene."""
         self.wink.activate()