[ZT] deprecate legacy tunnels (#25907)

* Remove legacy Cloudflare Tunnel docs; add redirects and update references

* remove legacy tunnel references

Author: ranbel

public/__redirects

@@ -2198,6 +2198,7 @@
 /cloudflare-one/connections/connect-networks/install-and-setup/installation/ /cloudflare-one/connections/connect-networks/downloads/update-cloudflared/ 301
 /cloudflare-one/connections/connect-networks/do-more-with-tunnels/secure-server/ /cloudflare-one/connections/connect-networks/configure-tunnels/tunnel-with-firewall/ 301
 /cloudflare-one/connections/connect-networks/do-more-with-tunnels/grafana/ /cloudflare-one/connections/connect-networks/monitor-tunnels/grafana/ 301
+/cloudflare-one/connections/connect-networks/do-more-with-tunnels/migrate-legacy-tunnels/ /cloudflare-one/connections/connect-networks/ 301
 /cloudflare-one/connections/connect-networks/downloads/system-requirements/ /cloudflare-one/connections/connect-networks/deploy-tunnels/system-requirements/ 301
 /cloudflare-one/connections/connect-networks/private-net/connect-private-networks/ /cloudflare-one/connections/connect-networks/private-net/cloudflared/ 301
 /cloudflare-one/connections/connect-networks/private-net/create-private-networks/ /cloudflare-one/connections/connect-networks/private-net/warp-to-warp/ 301
@@ -2293,6 +2294,7 @@
 /cloudflare-one/tutorials/do-not-decrypt/ /cloudflare-one/policies/gateway/http-policies/common-policies/#skip-inspection-for-groups-of-applications 301
 /cloudflare-one/tutorials/identity-dns/ /cloudflare-one/policies/gateway/dns-policies/common-policies/#restrict-access-to-specific-groups 301
 /cloudflare-one/tutorials/many-cfd-one-tunnel/ /cloudflare-one/connections/connect-networks/deployment-guides/kubernetes/ 301
+/cloudflare-one/tutorials/migrate-lb-tunnel/ /cloudflare-one/connections/connect-networks/ 301
 /cloudflare-one/tutorials/multi-origin/ /cloudflare-one/connections/connect-networks/get-started/ 301
 /cloudflare-one/tutorials/review-gateway-block/ /cloudflare-one/analytics/logs/gateway-logs/ 301
 /cloudflare-one/tutorials/require-swg/ /cloudflare-one/identity/devices/ 301

src/content/docs/cloudflare-one/connections/connect-networks/do-more-with-tunnels/migrate-legacy-tunnels.mdx

@@ -67,8 +67,6 @@ To log external visitor IPs, you will need to [configure an alternative method](
 
 Cloudflare Tunnel was previously named Warp during the beta phase. As Warp was added to the Argo product family, we changed the name to Argo Tunnel to match. Once we no longer required users to purchase Argo to create Tunnels, we renamed Argo Tunnel to Cloudflare Tunnel.
 
-For more information about migrating from Argo Tunnel, refer to [Migrate legacy tunnels](/cloudflare-one/connections/connect-networks/do-more-with-tunnels/migrate-legacy-tunnels/).
-
 ## Is it possible to restore a deleted tunnel?
 
 No. You cannot undo a tunnel deletion. If the tunnel was locally-managed, its [`config.yaml` file](/cloudflare-one/connections/connect-networks/get-started/tunnel-useful-terms/#configuration-file) will still be present and you can create a new tunnel with the same configuration. If the tunnel was remotely-managed, both the tunnel and its configuration are permanently deleted.