instance: Remove no longer used parameters

Related T1531

site-modules/profile/manifests/swh/deploy/worker/instance.pp

 # Instance of a worker
 define profile::swh::deploy::worker::instance (
   $ensure = present,
-  $task_broker = '',
-  $task_modules = [],
-  $task_queues = [],
-  $task_soft_time_limit = 0,
   $concurrency = 10,
   $loglevel = 'info',
   $max_tasks_per_child = 5,

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T1531 is now #1531 (closed)