kdd: fix free of array-typed value

g->id is an array and is allocated as part of g itself; it's not a
separate allocation.

Coverity-ID: 1054980
Signed-off-by: Matthew Daley <mattjd@gmail.com>
Acked-by: Tim Deegan <tim@xen.org>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

tools/debugger/kdd/kdd-xen.c

@@ -619,7 +619,6 @@ void kdd_guest_teardown(kdd_guest *g)
 {
     flush_maps(g);
     xc_interface_close(g->xc_handle);
-    free(g->id);
     free(g->hvm_buf);
     free(g);
 }