tmem: Remove in xc_tmem_control_oid duplicate set_xen_guest_handle call

We are doing another call to set_xen_guest_handle right
after the xc_hypercall_bounce_pre (the correct place to do it).

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

tools/libxc/xc_tmem.c

@@ -110,7 +110,6 @@ int xc_tmem_control_oid(xc_interface *xch,
     op.pool_id = pool_id;
     op.u.ctrl.subop = subop;
     op.u.ctrl.cli_id = cli_id;
-    set_xen_guest_handle(op.u.ctrl.buf,buf);
     op.u.ctrl.arg1 = arg1;
     op.u.ctrl.arg2 = arg2;
     op.u.ctrl.oid[0] = oid.oid[0];