Why do I see generators for frameworks I have removed from a Rails 3 project?

When I comment out the lines that require the Active Record and Test Unit railties in config/application.rb and do a rails generate in the project root folder, I still see tasks for the above frameworks in the list of generators.

% rails generate

...
ActiveRecord:
  active_record:migration
  active_record:model
...

Is this expected behavior? If not, what do I do to remo开发者_开发技巧ve these from the list of available generators?

It doesn't make or break anything, but it's annoying!

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Are the gems still in your Gemfile? That's the likely candidate.