Remove stale exploiters

[mssalvatore]

Officially remove stale/obsolete exploiters.

• Drupal - This exploiter only affects Drupal 8, which has been EOL since November 2021
• Struts - This vulnerability has been patched since March 2017
• Weblogic - This vulnerability has been patched since October 2017

Tasks

• Completely remove the Drupal exploiter code (0d) - @shreyamalviya
  • Remove any disused code
  • Remove any disused dependencies
• Completely remove the Struts exploiter code (0d) - @ilija-lazoroski
  • Remove any disused code
  • Remove any disused dependencies
• Completely remove the Weblogic exploiter code (0d) - @ilija-lazoroski
  • Remove any disused code
  • Remove any disused dependencies