Breaking: #97454 - Removed Link Browser hooks
with its two functions
modifyAllowedItems() has been removed in favor of two new PSR-14 Events
Any hook implementation registered is not executed anymore in
TYPO3 v12.0+. The extension scanner will report possible usages.
All TYPO3 installations using this hook in custom extension code.
The hooks are removed without deprecation in order to allow extensions
to work with TYPO3 v11 (using the hook) and v12+ (using the new Event)
when implementing the Event as well without any further deprecations.
Use the PSR-14 Event
as an improved replacement.