[gtk+] checkbutton: Remove unused function prototype

[Timm Bäder <baedert src gnome org>]

commit eb0c5a6a6cc786ac795b81ee4d85e2d08aee6bcb
Author: Timm Bäder <mail baedert org>
Date:   Fri Jan 27 11:07:41 2017 +0100

    checkbutton: Remove unused function prototype

 gtk/gtkcheckbutton.h |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkcheckbutton.h b/gtk/gtkcheckbutton.h
index 66cc5ff..45aa847 100644
--- a/gtk/gtkcheckbutton.h
+++ b/gtk/gtkcheckbutton.h
@@ -75,10 +75,6 @@ GtkWidget* gtk_check_button_new_with_label    (const gchar *label);
 GDK_AVAILABLE_IN_ALL
 GtkWidget* gtk_check_button_new_with_mnemonic (const gchar *label);
 
-void _gtk_check_button_get_props (GtkCheckButton *check_button,
-                                 gint           *indicator_size,
-                                 gint           *indicator_spacing);
-
 G_END_DECLS
 
 #endif /* __GTK_CHECK_BUTTON_H__ */