RDMA/rxe: Don't schedule rxe_completer from rxe_requester

Now that rxe_completer() is always called serially after rxe_requester()
there is no reason to schedule rxe_completer() from rxe_requester().

Link: https://lore.kernel.org/r/20240329145513.35381-9-rpearsonhpe@gmail.com


Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>