Removes 'unloadable' from plugin templates (#20513).

Patch by Go MAEDA.

git-svn-id: http://svn.redmine.org/redmine/trunk@17160 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/generators/redmine_plugin_controller/templates/controller.rb.erb

@@ -1,6 +1,4 @@
 class <%= @controller_class %>Controller < ApplicationController
-  unloadable
-
 <% actions.each do |action| -%>
 
   def <%= action %>

lib/generators/redmine_plugin_model/templates/model.rb.erb

@@ -1,3 +1,2 @@
 class <%= @model_class %> < ActiveRecord::Base
-  unloadable
 end