Merge branch 'add-support-remove-milestone' into 'master'

Add support for destroying project milestones

### What does this MR do?

This MR adds a "Remove" button to the project milestones page and the milestone page itself.

### Why was this MR needed?

Because lots of people talked about needing to clean their toilets. :)

### What are the relevant issue numbers?

Closes https://github.com/gitlabhq/gitlabhq/issues/1504

### Screenshots

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ef8c7a3ea1db7b37cccae3869ac4de0a/image.png)

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/33eb01c7bc30fb235de96db5efb8746d/image.png)

See merge request !980

1 files changed, 1 insertions, 1 deletions

diff --git a/config/routes.rb b/config/routes.rb
index 055d59a0c93..2e16c3ecb39 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -481,7 +481,7 @@ Gitlab::Application.routes.draw do
           end
         end
 
-        resources :milestones, except: [:destroy], constraints: { id: /\d+/ } do
+        resources :milestones, constraints: { id: /\d+/ } do
           member do
             put :sort_issues
             put :sort_merge_requests