tap_int.h: remove repeating NETWORK_SCRIPT defines

DEFAULT_NETWORK_SCRIPT and DEFAULT_NETWORK_DOWN_SCRIPT
have been defined in net/net.h included in
tap.c, which is the only C file that using those two macro.
Let's remove the repeating macroinstruction.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

net/tap_int.h

@@ -29,9 +29,6 @@
 #include "qemu-common.h"
 #include "qapi-types.h"
 
-#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
-#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
-
 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
              int vnet_hdr_required, int mq_required);