Remove old unused stuff

Rakefile

@@ -1,4 +1,3 @@
-require 'bundler/setup'
 require 'bundler/gem_tasks'
 require 'appraisal'
 require 'rake/testtask'
@@ -13,18 +12,3 @@ task :default => :test
 Rake::TestTask.new(:bench) do |test|
   test.pattern = 'test/benchmark_test.rb'
 end
-
-task :test_all do
-  system('rake test RAILS_VERSION="~> 3.0.0"')
-  system('rake test RAILS_VERSION=">= 3.0.0"')
-end
-
-# 'gem install rdoc' to upgrade RDoc if this is giving you errors
-require 'rdoc/task'
-RDoc::Task.new do |rd|
-  rd.rdoc_files.include("lib/**/*.rb")
-end
-
-require 'rake/clean'
-CLEAN.include "**/*.rbc"
-CLEAN.include "**/.DS_Store"