Remove QNX file.

src/include/port/qnx4.h

@@ -1,12 +0,0 @@
-#include <sys/types.h>			/* for namser.h */
-#include <arpa/nameser.h>		/* for BYTE_ORDER */
-#include <process.h>			/* for execv */
-#include <ioctl.h>				/* for unix.h */
-#include <unix.h>
-#include <sys/select.h>			/* for select */
-
-#undef HAVE_GETRUSAGE
-
-extern int	isnan(double dsrc);
-extern long random(void);
-extern void srandom(unsigned int seed);