ActiveSupport delegation is preferred over Forwardable

app/models/concerns/cache_markdown_field.rb

@@ -11,14 +11,15 @@ module CacheMarkdownField
   # Knows about the relationship between markdown and html field names, and
   # stores the rendering contexts for the latter
   class FieldData
-    extend Forwardable
-
     def initialize
       @data = {}
     end
-    def_delegators :@data, :[], :[]=
-    def_delegator :@data, :keys, :markdown_fields
+    delegate :[], :[]=, to: :@data
+
+    def markdown_fields
+      @data.keys
+    end
     def html_field(markdown_field)
       "#{markdown_field}_html"

lib/gitlab/git/repository.rb

 # Gitlab::Git::Repository is a wrapper around native Rugged::Repository object
-require 'forwardable'
 require 'tempfile'
 require 'forwardable'
 require "rubygems/package"
@@ -7,7 +6,6 @@ require "rubygems/package"
 module Gitlab
   module Git
     class Repository
-      extend Forwardable
       include Gitlab::Git::Popen
       SEARCH_CONTEXT_LINES = 3