Loading a component defined in a registration didn't actually work and was undocumented, so let's just remove it instead of fixing #23005.
## Checklist:
- [X] The code change is tested and works locally.
- [X] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
- [X] There is no commented out code in this PR.
* Register devices into the registry
* Switch to device ID instead of webhook ID
* Rearchitect mobile_app to support config entries
* Kill DATA_REGISTRATIONS by migrating registrations into config entries
* Fix tests
* Improve how we get the config_entry_id
* Remove single_instance_allowed
* Simplify setup_registration
* Move webhook registering functions into __init__.py since they are only ever used once
* Kill get_registration websocket command
* Support description_placeholders in async_abort
* Add link to mobile_app implementing apps in abort dialog
* Store config entry and device registry entry in hass.data instead of looking it up
* Add testing to ensure that the config entry is created at registration
* Fix busted async_abort test
* Remove unnecessary check for entry is None
* Update location schema
* Generate a random device ID at registration time for later use with device_tracker.see
* Remove host name from device_tracker.see payload
* Drop consider_home from the payload
* Remove stale consider_home in schema
* Remove source_type
* Update registration schema to add os_name (required) and make app_name required
* Ensure that a provided app_component is valid and available
* Ensure that component DEPENDENCIES declares mobile_app
* Update homeassistant/helpers/config_validation.py
* Standardize error responses
* Dont generalize REGISTER_BAD_COMPONENT
* Fix tests after merge
* First webhook commands for getting and deleting single registrations
* Keep a list of deleted webhook IDs so we can 410 if the webhook receives traffic in the future
* Return a empty JSON object instead of None
* Split up mobile_app bits into individual files
* Add typing
* Sort keys
* Remove unused async_setup_entry
* New decorator method of registering webhooks
* Add tests for cloud hook forwarding and improve error handling for cloud hooks
* Initial implementation of platform specific logic
* Add get registrations by user ID websocket call, minor style fixes
* Stop using resp dictionary during registration
* Move mobile_app/ios.py to ios/mobile_app.py
* Log any errors encountered during webhook
* Improve update registration call
* Split up mobile_app tests to match split up component
* Fix tests
* Remove integration_map in favor of component name in registration
* Add a few helper functions for custom logic components to use
* Load the app_component platform at device registration or component setup time
* Remove extraneous function
* Use guard function for checking if component is in device
* Inline websocket schemas
* Rename ATTR_s used in storage to DATA_ prefix
* squash flake8 and pylint issues
* Remove ios.mobile_app platform
* Dont mark websocket_api as a dependency
* Return standard empty_okay_response with 400 if no JSON sent
* Ensure deleted webhook IDs are registered at launch
* Remove the creation of cloudhooks during handle_webhook
* Rename device to registration everywhere applicable
* Dont check if cloud is logged in, just check if cloud is in components
* Dont ever use cloudhook_id
* Remove component loading logic for a later PR
* Cast exception to string
* Remove unused functions
Franck Nijhof
Marc Mueller
tkdrob
Tom Brien
Paulus Schoutsen
Ville Skyttä
springstan
Diefferson Koderer Môro
Robbie Trencheny
Paulus Schoutsen