Revert "Defer loading of ActiveRecord to avoid config issues"

This reverts commit 4bd4300.

lib/friendly_id.rb

@@ -4,7 +4,6 @@
 require "friendly_id/object_utils"
 require "friendly_id/configuration"
 require "friendly_id/finder_methods"
-require 'friendly_id/railtie' if defined?(Rails)
 
 =begin
 

lib/friendly_id/object_utils.rb

@@ -2,6 +2,7 @@ module FriendlyId
   # Instances of these classes will never be considered a friendly id.
   # @see FriendlyId::ObjectUtils#friendly_id
   UNFRIENDLY_CLASSES = [
+    ActiveRecord::Base,
     Array,
     FalseClass,
     Hash,
@@ -58,15 +59,11 @@ def unfriendly_id?
       true
     end
   end
-
-  def self.mark_as_unfriendly(klass)
-    klass.send(:include, FriendlyId::UnfriendlyUtils)
-  end
 end
 
 Object.send :include, FriendlyId::ObjectUtils
 
 # Considered unfriendly if object is an instance of an unfriendly class or
 # one of its descendants.
 
-FriendlyId::UNFRIENDLY_CLASSES.each { |klass| FriendlyId.mark_as_unfriendly(klass) }
+FriendlyId::UNFRIENDLY_CLASSES.each { |klass| klass.send(:include, FriendlyId::UnfriendlyUtils) }

test/object_utils_test.rb

@@ -19,8 +19,6 @@ class ObjectUtilsTest < TestCaseClass
   end
 
   test "ActiveRecord::Base instances should be unfriendly_ids" do
-    FriendlyId.mark_as_unfriendly(ActiveRecord::Base)
-
     model_class = Class.new(ActiveRecord::Base) do
       self.table_name = "authors"
     end