Stop checking for 'ntfslabel --new-serial' support

The oldest supported distributions have these versions of ntfs-3g /
ntfsprogs.

  Distro             EOL        ntfs-3g / ntfsprogs
- Debian 8           2020-Jun   2014.2.16AR.2
- RHEL / CentOS 7    2024-Jun   2017.3.23
- Ubuntu 14.04 LTS   2019-Apr   2013.1.13AR.1

The oldest version of ntfs-3g / ntfsprogs on Ubuntu 14.04 LTS includes
support for the --new-serial option.

    $ ntfslabel -V

    ntfslabel v2013.1.13AR.1 (libntfs-3g) - Display, or set, the label for an NTFS Volume.

    $ ntfslabel --help | grep -- --new-serial
            --new-serial   Set a new serial number

Therefore it is no longer necessary to check for this option as it is
always available.  The worst case scenario is that some how an old
version of ntfslabel is used which doesn't support this option.  In such
a case GParted goes from not supporting changing the UUID to claiming
support, but presumably it would fail with an error reporting unknown
option when applied.  Arguably better from an end user support point of
view.
4 jobs for faster-ntfs-read in 37 minutes and 29 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #274906
centos_build

00:09:09

passed #274907
ubuntu_build

00:11:26

 
  Test
passed #274908
centos_test

00:21:39

passed #274909
ubuntu_test

00:26:02