moved cost_types widget into redmine_reporting plugin as its not an engine feature

lib/widget/cost_types.rb

@@ -1,22 +0,0 @@
-class Widget::CostTypes < Widget::Base
-  def render_with_options(options, &block)
-    @cost_types = options.delete(:cost_types)
-    @selected_type_id = options.delete(:selected_type_id)
-
-    super(options, &block)
-  end
-
-  def render
-    write contents
-  end
-
-  def contents
-    content_tag :div do
-      available_cost_type_tabs(@subject).map do |id, label|
-        type_selection = radio_button_tag("unit", id, id == @selected_type_id)
-        type_selection += label_tag "unit_#{id}", h(label)
-        type_selection
-      end.join("</br>")
-    end
-  end
-end