Removed unnecessary setup for make bundled_gems_spec-run

Author: hsbt

spec/bundled_gems_spec.rb

@@ -22,7 +22,6 @@ def self.ruby=(ruby)
     Gem.ruby = ENV["RUBY"] if ENV["RUBY"]
 
     require_relative "bundler/support/rubygems_ext"
-    Spec::Rubygems.test_setup
     Spec::Helpers.install_dev_bundler
     FileUtils.mkdir_p Spec::Path.gem_path
   end