ssa.c: Remove a couple of no longer used defines

SMDB_PRELOAD_PATH and PRDB_PRELOAD_PATH are now unused.

This is since the following commits:

commit d982edf86dd5691268a3881dff856d99349b8a58
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Fri Oct 31 17:53:11 2014 +0200

    distrib: Eliminated no longer used or needed INETGRATION and ACCESS_INTEGRAT

    Signed-off-by: Hal Rosenstock <hal@mellanox.com>

commit 3587f045f30b5a69d92921f2458b120445ff4131
Author: Hal Rosenstock <hal@mellanox.com>
Date:   Fri Oct 31 17:39:07 2014 +0200

    core: Eliminated no longer used or needed CORE_INTEGRATION define

    Signed-off-by: Hal Rosenstock <hal@mellanox.com>

Signed-off-by: Sasha Kotchubievsky <sashakot@mellanox.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>