Fix bug in check_config when an integration is removed by its own validator (#96068)

* Raise if present is False

* Fix feedback

* Update homeassistant/helpers/check_config.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* Update homeassistant/helpers/check_config.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* Fix tests

---------

Co-authored-by: Erik Montnemery <erik@montnemery.com>

homeassistant/helpers/check_config.py

@@ -181,7 +181,9 @@ async def async_check_ha_config_file(  # noqa: C901
         if config_schema is not None:
             try:
                 config = config_schema(config)
-                result[domain] = config[domain]
+                # Don't fail if the validator removed the domain from the config
+                if domain in config:
+                    result[domain] = config[domain]
             except vol.Invalid as ex:
                 _comp_error(ex, domain, config)
                 continue

tests/helpers/test_check_config.py

@@ -8,9 +8,10 @@ from homeassistant.helpers.check_config import (
     CheckConfigError,
     async_check_ha_config_file,
 )
+import homeassistant.helpers.config_validation as cv
 from homeassistant.requirements import RequirementsNotFound
 
-from tests.common import mock_platform, patch_yaml_files
+from tests.common import MockModule, mock_integration, mock_platform, patch_yaml_files
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -246,3 +247,20 @@ bla:
         assert err.domain == "bla"
         assert err.message == "Unexpected error calling config validator: Broken"
         assert err.config == {"value": 1}
+
+
+async def test_removed_yaml_support(hass: HomeAssistant) -> None:
+    """Test config validation check with removed CONFIG_SCHEMA without raise if present."""
+    mock_integration(
+        hass,
+        MockModule(
+            domain="bla", config_schema=cv.removed("bla", raise_if_present=False)
+        ),
+        False,
+    )
+    files = {YAML_CONFIG_FILE: BASE_CONFIG + "bla:\n  platform: demo"}
+    with patch("os.path.isfile", return_value=True), patch_yaml_files(files):
+        res = await async_check_ha_config_file(hass)
+        log_ha_config(res)
+
+        assert res.keys() == {"homeassistant"}