Sould data be removed from authmap table when module unistalled?

Problem/Motivation

If the module is unistalled, that should mean the data inside the table "authmap' with the provider 'CAS' should be removed, isn't it?
otherwise there are many entries in the database with a provider that is not installed anymore.

Steps to reproduce

1. Have entries with the cas provider in the database or in 'admin/people/authmap/cas'
2. uninstall the module
3. check the database, the entries are still there (db or 'admin/people/authmap/cas')

Proposed resolution

1. Add a hook_uninstall to remove any data with the provider
2. Include a sql query that can be executed with drush for those with the module already uninstalled and want to clean the DB

Remaining tasks

Code and query creation

thnks in advance