4747 remove unused [DS]SIZE_LIMIT defines
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Robert Mustacchi <rm@joyent.com>

PSARC 2008/622 32-bit Address Restriction Software Capabilities Flag
6755162 ADDR32 software capability: restrict a 64-bit process to the lower 32 bits of the address space

OpenSolaris Launch