task: #3582666 Remove obsolete LayoutDiscoveryRequirements class
Remove the obsolete LayoutDiscoveryRequirements class. It checks for the layout_plugin contrib module which has been obsolete for 9 years and cannot be installed on modern Drupal.
Remove the obsolete LayoutDiscoveryRequirements class. It checks for the layout_plugin contrib module which has been obsolete for 9 years and cannot be installed on modern Drupal.