Remove setup_platform for demo (#100867)

tests/components/demo/test_media_player.py

@@ -13,6 +13,7 @@ from homeassistant.const import (
     STATE_OFF,
     STATE_PAUSED,
     STATE_PLAYING,
+    Platform,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import DATA_CLIENTSESSION
@@ -26,6 +27,11 @@ TEST_ENTITY_ID = "media_player.walkman"
 @pytest.fixture(autouse=True)
 def autouse_disable_platforms(disable_platforms):
     """Auto use the disable_platforms fixture."""
+    with patch(
+        "homeassistant.components.demo.COMPONENTS_WITH_CONFIG_ENTRY_DEMO_PLATFORM",
+        [Platform.MEDIA_PLAYER],
+    ):
+        yield
 
 
 @pytest.fixture(name="mock_media_seek")