variable-delete

Delete a variable.

drush variable-delete

Aliases:

Arguments:

name : The name of a variable or the first few letters of its name.

Options:

--yes : Skip confirmation if only one variable name matches.
--exact : Only delete the one variable that exactly matches the specified name.

Examples:

Delete the user_pictures variable.

drush vdel user_pictures

Choose from a list of variables beginning with "u" to delete.

drush vdel u

Bring the site back online, skipping confirmation. Variable is rewritten to site_offline for Drupal 6.

drush vdel -y --exact maintenance_mode