Remove these two functions since all their callers have been removed.
See also commit ea8c2d8f ("RDMA/core: Remove unused ib cache
functions").
Signed-off-by: NBart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>