RDMA/rtrs: Remove unused functions

The two functions are unused, so just remove them.

Link: https://lore.kernel.org/r/20210806112112.124313-3-haris.iqbal@ionos.com


Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>