RDMA/efa: Remove unused ucontext parameter from efa_qp_user_mmap_entries_remove

The ucontext parameter is unused, remove it.

Link: https://lore.kernel.org/r/20200114085706.82229-6-galpress@amazon.com


Reviewed-by: Firas JahJah <firasj@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>