unload lifecycle function not implemented

[kim1882]

Describe the bug or question
When mount promise doesn't resolve or reject, since I have a mount max timeout set , my application is moved to SKIP_BECAUSE_BROKEN state, in the docs recommend to call unloadApplication to force the NOT_LOADED state in order to retry the mount again.

However, the docs also mention that the application MUST implement the unload lifecycle function, which react doesn't have.

To Reproduce
When calling unloadApplication, application doesn't switch to NOT_LOADED state, because unload doesn't exist.

Expected behavior
When calling unloadApplication, application should switch to NOT_LOADED state and retry the mount.