Breaking: #97151 - Remove "Database Relations" backend module 

Description 

The backend submodule Database Relations within DB Check provided information about potentially broken database relations. However, the information it displayed was very limited and barely helpful. In addition, the entire module and its code have not received any meaningful updates in recent years.

Due to this, the module has been removed.

Impact 

The module has been removed. Existing links and stored bookmarks will no longer work.

Affected installations 

All TYPO3 installations are affected.

Migration 

There is no migration available.