Remove duplicated code in Oauth::AuthorizationsController

app/controllers/oauth/authorizations_controller.rb

 class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
-  before_action :authenticate_resource_owner!
-
   layout 'profile'
 
+  # Overriden from Doorkeeper::AuthorizationsController to
+  # include the call to session.delete
   def new
     if pre_auth.authorizable?
       if skip_authorization? || matching_token?
@@ -16,44 +16,4 @@ class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
       render "doorkeeper/authorizations/error"
     end
   end
-
-  # TODO: Handle raise invalid authorization
-  def create
-    redirect_or_render authorization.authorize
-  end
-
-  def destroy
-    redirect_or_render authorization.deny
-  end
-
-  private
-
-  def matching_token?
-    Doorkeeper::AccessToken.matching_token_for(pre_auth.client,
-                                               current_resource_owner.id,
-                                               pre_auth.scopes)
-  end
-
-  def redirect_or_render(auth)
-    if auth.redirectable?
-      redirect_to auth.redirect_uri
-    else
-      render json: auth.body, status: auth.status
-    end
-  end
-
-  def pre_auth
-    @pre_auth ||=
-      Doorkeeper::OAuth::PreAuthorization.new(Doorkeeper.configuration,
-                                              server.client_via_uid,
-                                              params)
-  end
-
-  def authorization
-    @authorization ||= strategy.request
-  end
-
-  def strategy
-    @strategy ||= server.authorization_request(pre_auth.response_type)
-  end
 end