Remove glib compatibility code that is not required anymore

Now that we bumped the minimum glib version to 2.66, we can drop
the old code.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20240418101056.302103-9-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2 files changed