deps: remove unused openssl files

Refs: https://github.com/nodejs/node/issues/5615
PR-URL: https://github.com/nodejs/node/pull/5619


Reviewed-By: Fedor Indutny <fedor@indutny.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Rod Vagg <rod@vagg.org>