[gvfs] udisks2: Remove obsoleted code

[Ondrej Holy <oholy src gnome org>]

commit 6e422601d2e055c39315dcea03a57fcbd203b9d6
Author: Ondrej Holy <oholy redhat com>
Date:   Fri Oct 14 12:22:30 2016 +0200

    udisks2: Remove obsoleted code
    
    Let's remove code for gio < 2.31.19, GVfs already requires a newer
    version.

 monitor/udisks2/gvfsudisks2volume.c |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/monitor/udisks2/gvfsudisks2volume.c b/monitor/udisks2/gvfsudisks2volume.c
index 8ed6dcc..0f912fe 100644
--- a/monitor/udisks2/gvfsudisks2volume.c
+++ b/monitor/udisks2/gvfsudisks2volume.c
@@ -845,11 +845,6 @@ gvfs_udisks2_volume_is_network_class (GVfsUDisks2Volume *volume)
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-/* can remove this once we depend on gio >= 2.31.19 */
-#ifndef G_VOLUME_IDENTIFIER_KIND_CLASS
-#define G_VOLUME_IDENTIFIER_KIND_CLASS "class"
-#endif
-
 static gchar *
 gvfs_udisks2_volume_get_identifier (GVolume      *_volume,
                                     const gchar  *kind)