Steps to reproduce:

1. Create a new article. Schedule it to be hidden in the distant future.
2. Run the ibexa:scheduled:run command to confirm that Total scheduled for hide: 1.
3. Move the article to trash.
4. Run ibexa:scheduled:run to confirm that Total scheduled for hide: 0.
5. Create a folder.
6. Create a new article in the folder. Schedule it to be hidden in a minute.
7. Move the folder to the trash so that the article is also trashed.
8. Run the ibexa:scheduled:run command to confirm that Total scheduled for hide: 1 if the hiding time has not passed yet.

Result:
If the hiding time has passed and the ibexa:scheduled:run command is executed, an exception is thrown:

Ibexa\Contracts\Core\Limitation\Target\DestinationLocation::__construct(): Argument #1 ($locationId) must be of type int, null given, called in /.../vendor/ibexa/core/src/lib/Repository/ContentService.php on line 2458

Expected result:
Scheduled entries should be deleted after removing their parent content. When running the ibexa:scheduled:run command there should be no scheduled entries present.