sysutils/xfce4-systemload-plugin: Fix build on i386

Removed old unneeded patch.

Reported by:	pkg-fallout

sysutils/xfce4-systemload-plugin/files/patch-panel-plugin_network.cc

@@ -1,29 +0,0 @@
---- panel-plugin/network.cc.orig	2022-02-16 18:57:05 UTC
-+++ panel-plugin/network.cc
-@@ -39,7 +39,7 @@ static gint
- #include <glibtop/netload.h>
- 
- static gint
--read_netload_libgtop (gulong *bytes)
-+read_netload_libgtop (guint64 *bytes)
- {
-     glibtop_netlist netlist;
-     char **interfaces = glibtop_get_netlist (&netlist);
-@@ -60,7 +60,7 @@ static gint
- #else
- 
- static gint
--read_netload_libgtop (gulong *bytes)
-+read_netload_libgtop (guint64 *bytes)
- {
-     return -1;
- }
-@@ -70,7 +70,7 @@ static gint
- static const char *const PROC_NET_NETSTAT = "/proc/net/netstat";
- 
- static gint
--read_netload_proc (gulong *bytes)
-+read_netload_proc (guint64 *bytes)
- {
-     char buf[4*1024];
-     unsigned long long dummy, in_octets, out_octets;