drop get_xen_guest_handle()

Its use in the tools (and its apparent abuse in the hypervisor) are
long gone.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -31,8 +31,6 @@
 #include <xsm/xsm.h>
 #include <asm/psr.h>
 
-#define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
-
 struct l3_cache_info {
     int ret;
     unsigned long size;
--- a/xen/arch/x86/x86_64/cpu_idle.c
+++ b/xen/arch/x86/x86_64/cpu_idle.c
@@ -21,9 +21,6 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
-#define __XEN_TOOLS__ /* for using get_xen_guest_handle macro */
-
-#include <xen/config.h>
 #include <xen/types.h>
 #include <xen/xmalloc.h>
 #include <xen/guest_access.h>
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -195,9 +195,6 @@
         _sxghr_tmp->q = 0;                                  \
         _sxghr_tmp->p = val;                                \
     } while ( 0 )
-#ifdef __XEN_TOOLS__
-#define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
-#endif
 #define set_xen_guest_handle(hnd, val) set_xen_guest_handle_raw(hnd, val)
 
 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
--- a/xen/include/public/arch-x86/xen.h
+++ b/xen/include/public/arch-x86/xen.h
@@ -54,9 +54,6 @@
 #define XEN_GUEST_HANDLE(name)          __XEN_GUEST_HANDLE(name)
 #define XEN_GUEST_HANDLE_PARAM(name)    XEN_GUEST_HANDLE(name)
 #define set_xen_guest_handle_raw(hnd, val)  do { (hnd).p = val; } while (0)
-#ifdef __XEN_TOOLS__
-#define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
-#endif
 #define set_xen_guest_handle(hnd, val) set_xen_guest_handle_raw(hnd, val)
 
 #if defined(__i386__)