Removed needless dir from LOAD_PATH.

Author: hsbt

Rakefile

@@ -2,8 +2,7 @@ require "bundler/gem_tasks"
 require "rake/testtask"
 
 Rake::TestTask.new(:test) do |t|
-  t.libs << "test" << "test/lib"
-  t.libs << "lib"
+  t.libs << "test/lib"
   t.test_files = FileList['test/**/test_*.rb']
 end