Remove unnecessary :js tags from rack-test-only scenarios

spec/features/admin/add_user_to_workshop_spec.rb

@@ -1,6 +1,6 @@
 require 'rails_helper'
 
-RSpec.describe 'Add a user to an existing workshop', :js do
+RSpec.describe 'Add a user to an existing workshop' do
   let(:member) { Fabricate(:member) }
 
   let!(:juliet) { Fabricate(:member, name: 'Juliet', surname: 'Capulet') }

spec/features/admin/manage_workshop_attendances_spec.rb

@@ -64,7 +64,7 @@
       expect(page).to have_css('i.fa-hat-wizard')
     end
 
-    scenario 'can rsvp an invited student to the workshop', :js do
+    scenario 'can rsvp an invited student to the workshop' do
       login_as_admin(member)
 
       other_invitation = Fabricate(:workshop_invitation, workshop:, attending: nil)

spec/features/viewing_pages_spec.rb

@@ -15,7 +15,7 @@
     expect(page).to have_text('Your privacy means a lot to us')
   end
 
-  scenario 'can access page not found', :js do
+  scenario 'can access page not found' do
     visit '/does_not_exist'
 
     expect(page).to have_text('Page not found')