rdma: removed SAS ordering requirement

There is no case in which not having Send-After-Send ordering causes issues,
so it is safe to remove it.
The only possible reordering that can happen is if a ctrl message is received
before a connect response message, but we already deal with this case correctly,
since the control message is added to the msgbuf and retrieved when isend is called.

Signed-off-by: Amedeo Sapio <asapio@amazon.com>

src/nccl_ofi_rdma.c

@@ -5743,8 +5743,8 @@ static void get_hints(struct fi_info *hints)
 
 	hints->mode = 0;
 
-	hints->tx_attr->msg_order = FI_ORDER_SAS;
-	hints->rx_attr->msg_order = FI_ORDER_SAS;
+	hints->tx_attr->msg_order = FI_ORDER_NONE;
+	hints->rx_attr->msg_order = FI_ORDER_NONE;
 
 	hints->ep_attr->type = FI_EP_RDM;