diff --git a/lib/schedule_attributes.rb b/lib/schedule_attributes.rb
index dbb24f3..5cbd45f 100644
--- a/lib/schedule_attributes.rb
+++ b/lib/schedule_attributes.rb
@@ -1,6 +1,5 @@
 require 'schedule_attributes/model'
 require 'schedule_attributes/railtie' if defined? Rails
-require 'schedule_attributes/form_builder' if defined? Formtastic
 
 if defined? Arel
   module Arel::Visitors
diff --git a/lib/schedule_attributes/form_builder.rb b/lib/schedule_attributes/form_builder.rb
deleted file mode 100644
index f10ac5a..0000000
--- a/lib/schedule_attributes/form_builder.rb
+++ /dev/null
@@ -1,42 +0,0 @@
-class ScheduleAttributes::FormBuilder < Formtastic::FormBuilder
-
-  def weekdays
-    Hash[ I18n.t('date.day_names').zip(ScheduleAttributes::DAY_NAMES) ]
-  end
-
-  def ordinal_month_days
-    (1..31).map { |d| [d.ordinalize, d] }
-  end
-
-  def ordinal_month_weeks
-    Hash["first", 1, "second", 2, "third", 3, "fourth", 4, "last", -1]
-  end
-
-  def one_time_fields(options={}, &block)
-    hidden = object.repeat.to_i == 1
-    @template.content_tag :div, hiding_field_options("schedule_one_time_fields", hidden, options), &block
-  end
-
-  def repeat_fields(options={}, &block)
-    hidden = object.repeat.to_i != 1
-    @template.content_tag :div, hiding_field_options("schedule_repeat_fields", hidden, options), &block
-  end
-
-  def ordinal_fields(options={}, &block)
-    hidden = object.interval_unit == 'month' && object.by_day_of == 'week'
-    @template.content_tag :div, hiding_field_options("schedule_ordinal_fields", hidden, options), &block
-  end
-
-  def weekday_fields(options={}, &block)
-    hidden = false
-    @template.content_tag :div, hiding_field_options("schedule_weekday_fields", hidden, options), &block
-  end
-
-  def hiding_field_options(class_name, hidden=false, options={})
-    hidden_style = "display: none" if hidden
-    options.tap do |o|
-      o.merge!(style: [o[:style], hidden_style].compact.join('; '))
-      o.merge!(class: [o[:class], class_name].compact.join(' '))
-    end
-  end
-end