[gtk] Remove unused variable in the CUPS print backend

[Emmanuele Bassi <ebassi src gnome org>]

commit b3be9868d83582a4af1ebae853dbcafe5b4aea5d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Feb 19 02:10:52 2018 +0000

    Remove unused variable in the CUPS print backend
    
    The variable is a leftover from when we were not using the
    G_DEFINE_DYNAMIC_TYPE macro.

 modules/printbackends/cups/gtkprintbackendcups.c | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/modules/printbackends/cups/gtkprintbackendcups.c 
b/modules/printbackends/cups/gtkprintbackendcups.c
index 454bc86a7e..09e18b170e 100644
--- a/modules/printbackends/cups/gtkprintbackendcups.c
+++ b/modules/printbackends/cups/gtkprintbackendcups.c
@@ -89,8 +89,6 @@ typedef struct _GtkPrintBackendCupsClass GtkPrintBackendCupsClass;
 #define _CUPS_MAP_ATTR_INT(attr, v, a) {if (!g_ascii_strcasecmp (attr->name, (a))) v = 
attr->values[0].integer;}
 #define _CUPS_MAP_ATTR_STR(attr, v, a) {if (!g_ascii_strcasecmp (attr->name, (a))) v = 
attr->values[0].string.text;}
 
-static GType print_backend_cups_type = 0;
-
 typedef void (* GtkPrintCupsResponseCallbackFunc) (GtkPrintBackend *print_backend,
                                                    GtkCupsResult   *result,
                                                    gpointer         user_data);