Move Rails/HABTM cop out of todo (#30118)

.rubocop_todo.yml

@@ -42,14 +42,6 @@ RSpec/MultipleMemoizedHelpers:
 RSpec/NestedGroups:
   Max: 6
 
-# Configuration parameters: Include.
-# Include: app/models/**/*.rb
-Rails/HasAndBelongsToMany:
-  Exclude:
-    - 'app/models/concerns/account/associations.rb'
-    - 'app/models/status.rb'
-    - 'app/models/tag.rb'
-
 Rails/OutputSafety:
   Exclude:
     - 'config/initializers/simple_form.rb'