devel/lua-posix: Revert 4717c9513cac82ea33d9939f218fd9b16e042883

The commit is incorrect and unapproved.
posix uses Lua built-in bit32 which is available since Lua 5.2.

Reference: https://cgit.FreeBSD.org/ports/commit/?id=5102d79f7137a81c593dd48505b8d3176b09c0aa

		https://lists.freebsd.org/archives/dev-commits-ports-main/2025-April/145638.html