Removed OS/2 kludge: it's not necessary.

Henning Meier-Geinitz <henning@meier-geinitz.de>

lib/inet_ntop.c

@@ -3,15 +3,8 @@
 #ifndef HAVE_INET_NTOP
 
 #include <string.h>
-
-#ifdef HAVE_OS2_H
-# include <sys/socket.h>
-# include <sys/types.h>
-#else
-# include <sys/types.h>
-# include <sys/socket.h>
-#endif
-
+#include <sys/types.h>
+#include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>