Do not require rubygems

Since haml requires ruby 1.9, we no longer need to require rubygems.

benchmark.rb

@@ -1,4 +1,3 @@
-require "rubygems"
 require "bundler/setup"
 require "haml"
 require "rbench"
@@ -13,7 +12,7 @@ END
   exit 1
 end
 
-%w[rubygems erb erubis rails active_support action_controller
+%w[erb erubis rails active_support action_controller
    action_view action_pack haml/template rbench].each {|dep| require(dep)}
 
 def view

test/test_helper.rb

@@ -12,7 +12,6 @@ if ENV["COVERAGE"]
   SimpleCov.start
 end
 
-require 'rubygems'
 require 'bundler/setup'
 require 'minitest/autorun'
 require 'action_pack'