Remove A/B test from Python20 course setup

app/controllers/concerns/submission_scoring.rb

@@ -92,13 +92,5 @@ module SubmissionScoring
         output.except!(:error_messages, :count, :failed, :filename, :message, :passed, :stderr, :stdout)
       end
     end
-
-    # Return all test results except for those of a linter if not allowed
-    show_linter = Python20CourseWeek.show_linter? submission.exercise, submission.user_id
-    outputs&.reject do |output|
-      next if show_linter || output.blank?
-
-      output[:file_role] == 'teacher_defined_linter'
-    end
   end
 end

app/controllers/exercises_controller.rb

@@ -298,11 +298,6 @@ class ExercisesController < ApplicationController
                else
                  current_user.id
                end
-
-    # Tips are collected and set with set_available_tips.
-    # Delete tips for those users who should not see them.
-    # Doing this here is beneficial because all other (admin) routes still work.
-    @tips = nil unless Python20CourseWeek.show_tips? @exercise, current_user.id
   end
 
   def set_course_token