Add DELETE to api cors

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

config/application.rb

@@ -82,7 +82,7 @@ module Gitlab
     config.middleware.use Rack::Cors do
       allow do
         origins '*'
-        resource '/api/*', headers: :any, methods: [:get, :post, :options, :put]
+        resource '/api/*', headers: :any, methods: [:get, :post, :options, :put, :delete]
       end
     end
   end