Deletes AS::Dependencies::Reference

This is an internal class which is no longer needed.

activesupport/lib/active_support/dependencies.rb

@@ -614,7 +614,6 @@ def remove_unloadable_constants!
       log("removing unloadable constants")
       autoloaded_constants.each { |const| remove_constant const }
       autoloaded_constants.clear
-      Reference.clear!
       explicitly_unloadable_constants.each { |const| remove_constant const }
     end
 
@@ -654,23 +653,16 @@ def clear!
       end
     end
 
-    Reference = ClassCache.new
-
-    # Store a reference to a class +klass+.
-    def reference(klass)
-      Reference.store klass
-    end
-
     # Get the reference for class named +name+.
     # Raises an exception if referenced class does not exist.
     def constantize(name)
-      Reference.get(name)
+      Inflector.constantize(name)
     end
 
     # Get the reference for class named +name+ if one exists.
     # Otherwise returns +nil+.
     def safe_constantize(name)
-      Reference.safe_get(name)
+      Inflector.safe_constantize(name)
     end
 
     # Determine if the given constant has been automatically loaded.

activesupport/test/dependencies_test.rb

@@ -708,21 +708,6 @@ def test_removal_from_tree_should_be_detected
     remove_constants(:ServiceOne)
   end
 
-  def test_references_should_work
-    with_loading "dependencies" do
-      c = ActiveSupport::Dependencies.reference("ServiceOne")
-      service_one_first = ServiceOne
-      assert_equal service_one_first, c.get("ServiceOne")
-      ActiveSupport::Dependencies.clear
-      assert_not defined?(ServiceOne)
-      service_one_second = ServiceOne
-      assert_not_equal service_one_first, c.get("ServiceOne")
-      assert_equal service_one_second, c.get("ServiceOne")
-    end
-  ensure
-    remove_constants(:ServiceOne)
-  end
-
   def test_constantize_shortcut_for_cached_constant_lookups
     with_loading "dependencies" do
       assert_equal ServiceOne, ActiveSupport::Dependencies.constantize("ServiceOne")