Change record status: 
Project: 
Introduced in branch: 
8.x
Description: 

Deprecated library names are removed.
From now one you have to use the namespaced versions.

$libraries['once'] ==> $libraries['jquery.once'];
$libraries['form'] ==> $libraries['jquery.form'];
$libraries['jquery-bbq'] ==> $libraries['jquery.bbq'];
$libraries['vertical-tabs'] ==> $libraries['drupal.vertical-tabs'];
$libraries['cookie'] ==> $libraries['jquery.cookie'];

Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done