Remove obsolete patch file.

x11/gtk/patches/patch-ae

@@ -1,19 +0,0 @@
-$NetBSD: patch-ae,v 1.2 1999/11/22 11:23:43 agc Exp $
-
---- gdk/gdkimage.c.orig	Fri Sep  3 19:56:57 1999
-+++ gdk/gdkimage.c	Mon Nov 22 11:12:23 1999
-@@ -26,12 +26,14 @@
- 
- #include <config.h>
- 
-+#ifdef __linux__
- /* gcc -ansi -pedantic on GNU/Linux causes warnings and errors
-  * unless this is defined:
-  * warning: #warning "Files using this header must be compiled with _SVID_SOURCE or _XOPEN_SOURCE"
-  */
- #ifndef _XOPEN_SOURCE
- #  define _XOPEN_SOURCE 1
-+#endif
- #endif
- 
- #include <stdlib.h>