Since I created the CommentsController yesterday, today I’m going to move the #destroy_comment method over to it.  I also threw in a bit of rename method magic to make it match the RESTful naming conventions.
Before
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 | class NewsController  'show', :id => @news
  end
end | 
class NewsController  'show', :id => @news
  end
end
 
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 | class CommentsController < ApplicationController
  # ...
end | 
class CommentsController < ApplicationController
  # ...
end
 
After
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 | class NewsController < ApplicationController
  # No more destroy_comment
end | 
class NewsController < ApplicationController
  # No more destroy_comment
end
 
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 | class CommentsController  :delete, :only => :destroy, :render => {:nothing => true, :status => :method_not_allowed }
  def destroy
    @news.comments.find(params[:comment_id]).destroy
    redirect_to :controller => 'news', :action => 'show', :id => @news
  end
end | 
class CommentsController  :delete, :only => :destroy, :render => {:nothing => true, :status => :method_not_allowed }
  def destroy
    @news.comments.find(params[:comment_id]).destroy
    redirect_to :controller => 'news', :action => 'show', :id => @news
  end
end
 
With this refactoring, the NewsController is looking really good.  There is only one non-standard method left, #preview.  Since Redmine already has a controller for previewing issues, I can use move method tomorrow and complete the NewsController.
Reference commit