Remove compatibility code for FreeBSD < 11.2 from all ports.

Simplify some ports where DragonFlyBSD no longer needs to be special-cased.
Submitted by:	rene
Reviewed by:	bapt, jbeich
Differential Revision:	https://reviews.freebsd.org/D17724

lang/python27/Makefile

@@ -109,13 +109,6 @@ PLIST_SUB+=	NO_NIS=""
 .endif
 
 post-patch:
-# readline shared library is present on base before FreeBSD 11 - r268461
-# force setup.py ignore base and use readline from ports
-.if ${OPSYS} == FreeBSD && ${OSVERSION} < 1100000
-	@${REINPLACE_CMD} -e \
-		"s|lib_dirs,\ \'readline\'|[\'${LOCALBASE}/lib\',\ \'.\'],\ \'readline\'|" \
-		${WRKSRC}/setup.py
-.endif
 	@${REINPLACE_CMD} -e 's|/usr/local/bin/python|${python_CMD}|' \
 		${WRKSRC}/Lib/cgi.py
 	@${REINPLACE_CMD} -e \