Remove unused lib/names_helper.rb

As of 7eb45672, NamesHelper is no longer used.

lib/gitlab_access.rb

 require_relative 'gitlab_init'
 require_relative 'gitlab_net'
 require_relative 'gitlab_access_status'
-require_relative 'names_helper'
 require_relative 'gitlab_metrics'
 require_relative 'object_dirs_helper'
 require 'json'
@@ -9,8 +8,6 @@ require 'json'
 class GitlabAccess
   class AccessDeniedError < StandardError; end
 
-  include NamesHelper
-
   attr_reader :config, :gl_repository, :repo_path, :changes, :protocol
 
   def initialize(gl_repository, repo_path, actor, changes, protocol)

lib/gitlab_post_receive.rb

@@ -6,8 +6,6 @@ require 'base64'
 require 'securerandom'
 
 class GitlabPostReceive
-  include NamesHelper
-
   attr_reader :config, :gl_repository, :repo_path, :changes, :jid
 
   def initialize(gl_repository, repo_path, actor, changes)

lib/names_helper.rb

-module NamesHelper
-  def extract_ref_name(ref)
-    ref.gsub(/\Arefs\/(tags|heads)\//, '')
-  end
-end

spec/names_helper_spec.rb

-require 'spec_helper'
-require 'names_helper'
-
-describe NamesHelper do
-  include NamesHelper
-
-  describe :extract_ref_name do
-    it { expect(extract_ref_name('refs/heads/awesome-feature')).to eq('awesome-feature') }
-    it { expect(extract_ref_name('refs/tags/v2.2.1')).to eq('v2.2.1') }
-    it { expect(extract_ref_name('refs/tags/releases/v2.2.1')).to eq('releases/v2.2.1') }
-  end
-end