xen: xenguest is not used so is not needed

There's no references in only file which includes xenguest.h
to any xen definitions. And there's no references to -lxenguest
in qemu, either. Drop it.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Message-Id: <20200727140048.19779-1-mjt@msgid.tls.msk.ru>
[perard: rebased]
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

configure

@@ -2532,7 +2532,7 @@ if test "$xen" != "disabled" ; then
     xen_ctrl_version="$(printf '%d%02d%02d' \
       $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
     xen=enabled
-    xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
+    xen_pc="xencontrol xenstore xenforeignmemory xengnttab"
     xen_pc="$xen_pc xenevtchn xendevicemodel"
     if $pkg_config --exists xentoolcore; then
       xen_pc="$xen_pc xentoolcore"
@@ -2541,7 +2541,7 @@ if test "$xen" != "disabled" ; then
     xen_libs="$($pkg_config --libs $xen_pc)"
   else
 
-    xen_libs="-lxenstore -lxenctrl -lxenguest"
+    xen_libs="-lxenstore -lxenctrl"
     xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"
 
     # First we test whether Xen headers and libraries are available.

hw/i386/xen/xen_platform.c

@@ -37,8 +37,6 @@
 #include "sysemu/block-backend.h"
 #include "qemu/error-report.h"
 #include "qemu/module.h"
-
-#include <xenguest.h>
 #include "qom/object.h"
 
 //#define DEBUG_PLATFORM