Remove empty spec file

spec/controllers/management/users_controller_spec.rb

@@ -1,12 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Management::UsersController, :type => :controller do
-
-  describe "GET index" do
-    it "returns http success" do
-      get :index
-      expect(response).to be_success
-    end
-  end
-
-end