def remove(release):
    '''
    Remove a specific version of the kernel.

    release
        The release number of an installed kernel. This must be the entire release
        number as returned by :py:func:`~salt.modules.kernelpkg_linux_apt.list_installed`,
        not the package name.

    CLI Example:

    .. code-block:: bash

        salt '*' kernelpkg.remove 4.4.0-70-generic
    '''
    if release not in list_installed():
        raise CommandExecutionError('Kernel release \'{0}\' is not installed'.format(release))

    if release == active():
        raise CommandExecutionError('Active kernel cannot be removed')

    target = '{0}-{1}'.format(_package_prefix(), release)
    log.info('Removing kernel package %s', target)

    __salt__['pkg.purge'](target)

    return {'removed': [target]}