Merge branch 'async-refs-dropdown' into 'master'

Refs dropdown is now loaded async

## What does this MR do?

The refs dropdown is loaded async so not to block the page.

## What are the relevant issue numbers?

Part of #18202

## Screenshots (if relevant)

![Screen_Shot_2016-06-07_at_14.41.21](/uploads/8fea12655f96fe7f7008a32677bff037/Screen_Shot_2016-06-07_at_14.41.21.png)

See merge request !4508

1 files changed, 0 insertions, 16 deletions

diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 439b015b3b8..82421d74de9 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -101,22 +101,6 @@ module ApplicationHelper
     'Never'
   end
 
-  def grouped_options_refs
-    repository = @project.repository
-
-    options = [
-      ['Branches', repository.branch_names],
-      ['Tags', VersionSorter.rsort(repository.tag_names)]
-    ]
-
-    # If reference is commit id - we should add it to branch/tag selectbox
-    if @ref && !options.flatten.include?(@ref) && @ref =~ /\A[0-9a-zA-Z]{6,52}\z/
-      options << ['Commit', [@ref]]
-    end
-
-    grouped_options_for_select(options, @ref || @project.default_branch)
-  end
-
   # Define whenever show last push event
   # with suggestion to create MR
   def show_last_push_widget?(event)