use activemodel scoped class name in helper method to remove need for .kind override

lib/validates_timeliness/helper_methods.rb

@@ -20,7 +20,7 @@ module ActiveModel
           self.timeliness_validated_attributes ||= []
           self.timeliness_validated_attributes += (attr_names - self.timeliness_validated_attributes)
         end
-        validates_with ValidatesTimeliness::Validator, options
+        validates_with TimelinessValidator, options
       end
     end
 

lib/validates_timeliness/validator.rb

@@ -22,10 +22,6 @@ module ValidatesTimeliness
 
     RESTRICTION_ERROR_MESSAGE = "Error occurred validating %s for %s restriction:\n%s"
 
-    def self.kind
-      :timeliness
-    end
-
     def initialize(options)
       @type = options.delete(:type) || :datetime
       @allow_nil, @allow_blank = options.delete(:allow_nil), options.delete(:allow_blank)