Strip tcpip.h of some unnecessary includes

tcpip.cc

@@ -123,9 +123,8 @@
  ***************************************************************************/
 
 /* $Id$ */
-#ifdef WIN32
-#include "nmap_winconfig.h"
-#endif
+
+#include "nmap.h"
 
 #include "nbase.h"
 #include "portreasons.h"
@@ -138,15 +137,6 @@
 
 #include "struct_ip.h"
 
-#if HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-
-#if HAVE_UNISTD_H
-/* #include <sys/unistd.h> */
-#include <unistd.h>
-#endif
-
 #if HAVE_NETINET_IF_ETHER_H
 #ifndef NETINET_IF_ETHER_H
 #include <netinet/if_ether.h>