Remove some unneeded requires

Kevin Paulisse · Kevin Paulisse · commit a7865f9e38f4 · 2017-04-02T09:07:05.000-04:00
diff --git a/lib/octocatalog-diff/catalog-util/git.rb b/lib/octocatalog-diff/catalog-util/git.rb
@@ -1,9 +1,6 @@
 # frozen_string_literal: true
 
-require 'fileutils'
-require 'open3'
 require 'rugged'
-require 'shellwords'
 
 require_relative '../errors'
 require_relative '../util/scriptrunner'
