[goffice] Compilation: remove incorrect G_GNUC_UNUSED.

[Morten Welinder <mortenw src gnome org>]

commit 010e9efa4fbe764585a51bcf55b8bb33d5c8834b
Author: Morten Welinder <terra gnome org>
Date:   Sun Oct 20 14:00:54 2013 -0400

    Compilation: remove incorrect G_GNUC_UNUSED.

 goffice/utils/go-pango-extras.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/goffice/utils/go-pango-extras.c b/goffice/utils/go-pango-extras.c
index 9b8e59b..8154125 100644
--- a/goffice/utils/go-pango-extras.c
+++ b/goffice/utils/go-pango-extras.c
@@ -701,7 +701,7 @@ go_pango_attr_subscript_copy (PangoAttribute const *attr)
 }
 
 static PangoAttribute *
-go_pango_attr_superscript_copy (G_GNUC_UNUSED PangoAttribute const *attr)
+go_pango_attr_superscript_copy (PangoAttribute const *attr)
 {
        GOPangoAttrSuperscript *at = (GOPangoAttrSuperscript *)attr;
        return go_pango_attr_superscript_new (at->val);