These classes were all introduced in Moodle 4.4.
Originally they were scheduled for removal in MDL-81134, but now that we
have MDL-82156 we can remove them immediately as the autoloader now
checks for the presence of a newer class and resets if that class is not
present in the autoloader cache.
This change replaces the requirement for:
- \core\hook\deprecated_callback_replacement
- \core\hook\described_hook
These are replaced by appropriate Attributes.