luci-base: widgets; remove maximal firewall zone name length datatype

removes a075566 (and subsequent fixes)

enforcing a datatype on this widget generates the following error when
multiple zones are selected:

 Expecting: valid UCI identifier

(the error triggered for uciname). At its simplest: multiple selections
are no longer just a uciname, but multiple thereof.

Signed-off-by: Paul Donald <newtwen+github@gmail.com>

modules/luci-base/htdocs/luci-static/resources/tools/widgets.js

@@ -148,7 +148,6 @@ var CBIZoneSelect = form.ListValue.extend({
 			display_items: this.display_size || this.size || 3,
 			dropdown_items: this.dropdown_size || this.size || 5,
 			validate: L.bind(this.validate, this, section_id),
-			datatype: L.hasSystemFeature('firewall4') ? 'uciname' : 'and(uciname,maxlength(11))',
 			create: !this.nocreate,
 			create_markup: '' +
 				'<li data-value="{{value}}">' +