Fix activesupport path

activemodel/lib/active_model.rb

@@ -21,12 +21,10 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #++
 
-activesupport_path = "#{File.dirname(__FILE__)}/../../../activesupport/lib"
+activesupport_path = "#{File.dirname(__FILE__)}/../../activesupport/lib"
 $:.unshift(activesupport_path) if File.directory?(activesupport_path)
 require 'active_support'
 
-require 'active_support/inflector'
-
 module ActiveModel
   autoload :Base, 'active_model/base'
   autoload :Observing, 'active_model/observing'