xprtrdma: Remove rpcrdma_buffer::rb_pool

Since commit 1e465fd4ff47 ("xprtrdma: Replace send and receive
arrays"), this field is no longer used.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
1 file changed