Move notifiable in app shared example to questions specs

spec/system/comments/legislation_questions_spec.rb

@@ -1,5 +0,0 @@
-require "rails_helper"
-
-describe "Commenting legislation questions" do
-  it_behaves_like "notifiable in-app", :legislation_question
-end

spec/system/legislation/questions_spec.rb

@@ -2,6 +2,8 @@ require "rails_helper"
 
 describe "Legislation" do
   context "process debate page" do
+    it_behaves_like "notifiable in-app", :legislation_question
+
     let(:process) do
       create(:legislation_process,
              debate_start_date: Date.current - 3.days,