_upgrade_422_remove_genericons()
Function: Cleans up Genericons example files.
Source: wp-admin/includes/update-core.php:1365
Function: Cleans up Genericons example files.
Source: wp-admin/includes/update-core.php:1365
Function: Execute changes made in WordPress 4.2.2.
Source: wp-admin/includes/upgrade.php:1441