Undefined method cache_template_extensions when migrating to Rails 2.3.5

After upgrading from Rails 2.0.2 to Rails 2.3.5 I got the following error message on startup of the server:

`send': undefined method `cache_template_extensions=' for ActionView::Base:Class (NoMethodError)

The solution is as simple as removing (or commenting out) the property 'cache_template_extensions' from 'configuration/environments/development.rb' as it no longer exists in rails 2.3.5.