[gtk] scrolledwindow: remove unused struct

[Timm Bäder <baedert src gnome org>]

commit 0f6e15cfa2849580652e7cac0e30fa5d45030713
Author: Timm Bäder <mail baedert org>
Date:   Thu Jan 17 16:02:13 2019 +0100

    scrolledwindow: remove unused struct

 gtk/gtkscrolledwindow.c | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 1495432c9e..5a6e122c34 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -212,13 +212,6 @@ typedef struct
   guint      over_timeout_id;
 } Indicator;
 
-typedef struct
-{
-  gdouble dx;
-  gdouble dy;
-  guint32 evtime;
-} ScrollHistoryElem;
-
 typedef struct
 {
   GtkWidget     *hscrollbar;