Remove sort-backends flag from cli docs

docs/user-guide/cli-arguments.md

@@ -32,7 +32,6 @@ They are set in the container spec of the `nginx-ingress-controller` Deployment
 | `--publish-service string`        | Service fronting the Ingress controller. Takes the form "namespace/name". When used together with update-status, the controller mirrors the address of this service's endpoints to the load-balancer status of all Ingress objects it satisfies. |
 | `--publish-status-address string` | Customized address to set as the load-balancer status of Ingress objects this controller satisfies. Requires the update-status parameter. |
 | `--report-node-internal-ip-address` | Set the load-balancer status of Ingress objects to internal Node addresses instead of external. Requires the update-status parameter. |
-| `--sort-backends`                 | Sort servers inside NGINX upstreams. |
 | `--ssl-passthrough-proxy-port int` | Port to use internally for SSL Passthrough. (default 442) |
 | `--stderrthreshold severity`      | logs at or above this threshold go to stderr (default 2) |
 | `--sync-period duration`          | Period at which the controller forces the repopulation of its local object stores. Disabled by default. |