Stop calling setFormFormatterName

[boutell]

As Laurynas Malisauskas <laurynas.malisauskas@…> pointed out this makes work for others who want to use the global version:

"in each Form configure method you declare default form formatter
name which prevents us from getting benefit of declaring global
undefault formatter in project configuration, for example
sfWidgetFormSchema::setDefaultFormFormatterName('Jaglas');"

Before you do this you need to make sure POGIL (and any newer projects using the plugin) won't be adversely affected.

Also you will need to document that you are no longer supplying sample CSS because you're leaving the choice of form formatter up to the user. Or you could supply an example in the docs, based on our own formatter.

[dordille]

I didn't know that there was a ticket for this but I fixed this one a ways back.