REFACTOR: admin embeddable hosts controller specs to requests (#5979)

spec/requests/admin/embeddable_hosts_controller_spec.rb

@@ -1,9 +1,7 @@
 require 'rails_helper'
 
 describe Admin::EmbeddableHostsController do
-
   it "is a subclass of AdminController" do
     expect(Admin::EmbeddableHostsController < Admin::AdminController).to eq(true)
   end
-
 end