fixed test spec and remove uncessary test files

spec/controllers/api/restaurant/zone_controller_spec.rb

@@ -1,12 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Api::Restaurant::ZoneController, type: :controller do
-
-  describe "GET #index" do
-    it "returns http success" do
-      get :index
-      expect(response).to have_http_status(:success)
-    end
-  end
-
-end