[gnome-color-manager] Remove g_type_class_add_private that is no longer required after cfd551b

[Robert Ancell <rancell src gnome org>]

commit 6cddf2026d948053abed22a042c8f605b49c6768
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Mar 28 14:17:56 2017 +1300

    Remove g_type_class_add_private that is no longer required after cfd551b

 src/gcm-print.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/gcm-print.c b/src/gcm-print.c
index ecaacf0..ac48c56 100644
--- a/src/gcm-print.c
+++ b/src/gcm-print.c
@@ -69,8 +69,6 @@ gcm_print_class_init (GcmPrintClass *klass)
                              G_STRUCT_OFFSET (GcmPrintClass, status_changed),
                              NULL, NULL, g_cclosure_marshal_VOID__UINT,
                              G_TYPE_NONE, 1, G_TYPE_UINT);
-
-       g_type_class_add_private (klass, sizeof (GcmPrintPrivate));
 }
 
 /**