Remove always-false/true conditions based on OSVERSION 500000

Sanity Test Results

lang/ocaml-camlidl:

This command (FreshPorts code 1):

make -V PORTNAME -V PKGNAME -V DESCR -V CATEGORIES -V PORTVERSION -V
PORTREVISION  -V COMMENT -V COMMENTFILE -V MAINTAINER -V EXTRACT_SUFX  -V
BUILD_DEPENDS -V RUN_DEPENDS -V LIB_DEPENDS -V FORBIDDEN -V BROKEN -V
DEPRECATED -V IGNORE  -V MASTERPORT -V LATEST_LINK -V NO_LATEST_LINK -V
NO_PACKAGE -V PKGNAMEPREFIX -V PKGNAMESUFFIX -V PORTEPOCH  -V RESTRICTED -V
NO_CDROM -V EXPIRATION_DATE -V IS_INTERACTIVE  -V ONLY_FOR_ARCHS -V
NOT_FOR_ARCHS -f /usr/home/dan/ports/lang/ocaml-camlidl/Makefile 
DISTDIR=/usr/ports/distfiles  PORTSDIR=/usr/home/dan/ports
LOCALBASE=/nonexistentlocal X11BASE=/nonexistentx
2>/tmp/FreshPorts.lang.ocaml-camlidl.make-error.2007.10.4.5.35.46.53726

produced this error:

Error message is: "/usr/home/dan/ports/lang/ocaml-camlidl/Makefile", line
66: Could not find bsd.port.port.mk
make: fatal errors encountered -- cannot continue

15 vulnerabilities affecting 24 ports have been reported in the past 14 days

^* - modified, not new

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