Check for CI enabled in correct place

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/projects/application_controller.rb

 class Projects::ApplicationController < ApplicationController
   before_action :project
   before_action :repository
-  before_action :ci_enabled, only: :ci
   layout 'project'
   def authenticate_user!

app/controllers/projects/graphs_controller.rb

@@ -5,6 +5,7 @@ class Projects::GraphsController < Projects::ApplicationController
   before_action :require_non_empty_project
   before_action :assign_ref_vars
   before_action :authorize_download_code!
+  before_action :ci_enabled, only: :ci
   def show
     respond_to do |format|