acm.c: Remove "dead" code from acm_parse_access_v1_paths_update

addr_type can currently only be either ACM_ADDRESS_LID or ACM_ADDRESS_GID.

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