+ # Run *plugin* to remove the users/domains in *targets*. The method
+ # signature includes the unused *cfg* for consistency with the
+ # runners that do need a {Configuration}.
+ #
+ # @param cfg [Configuration] unused.
+ #
+ # @param plugin [Class] plugin class that will perform the removal.
+ #
+ # @param targets [Array<User,Domain>] the users and domains to be
+ # removed.
+ #
+ def run(cfg, plugin, *targets)