Revert changes for Python20 fishbowl experiment

* Show all RfCs again, even those with #loesung

app/controllers/request_for_comments_controller.rb

@@ -18,7 +18,6 @@ class RequestForCommentsController < ApplicationController
                   .with_last_activity
                   .ransack(params[:q])
     @request_for_comments = @search.result
-                                .where("question NOT LIKE '%#loesung%'")
                                 .joins(:exercise)
                                 .where(exercises: {unpublished: false})
                                 .includes(submission: [:study_group])
@@ -99,8 +98,6 @@ class RequestForCommentsController < ApplicationController
 
     @request_for_comment = RequestForComment.new(request_for_comment_params)
 
-    @request_for_comment.solved = true if @request_for_comment.question.include?('#loesung')
-
     respond_to do |format|
       if @request_for_comment.save
         # create thread here and execute tests. A run is triggered from the frontend and does not need to be handled here.

app/policies/request_for_comment_policy.rb

@@ -8,7 +8,7 @@ class RequestForCommentPolicy < ApplicationPolicy
   end
 
   def show?
-    admin? || teacher_in_study_group? || author? || everyone && @record.question&.exclude?('#loesung')
+    everyone
   end
 
   def destroy?