Remove registry configuration doc

Author: chalindukodikara

docs/getting-started/try-it-out/on-managed-kubernetes.mdx

@@ -596,7 +596,6 @@ This guide provides a quick way to explore OpenChoreo. For production deployment
 
 3. **Infrastructure**: Scale out and isolate your planes.
    - [Multi-Cluster Connectivity](../../operations/multi-cluster-connectivity.mdx) (Isolate Control Plane from Data Planes)
-   - [External Container Registry](../../user-guide/ci/external-container-registry.mdx) (Switch to ECR/GCR/ACR)
    - [Observability](../../operations/observability-alerting.mdx) (Configure persistent OpenSearch and retention)
 
 ## Next Steps

docs/getting-started/try-it-out/on-self-hosted-kubernetes.mdx

@@ -559,7 +559,6 @@ This guide provides a quick way to explore OpenChoreo. For production deployment
 
 3. **Infrastructure**: Scale out and isolate your planes.
    - [Multi-Cluster Connectivity](../../operations/multi-cluster-connectivity.mdx) (Isolate Control Plane from Data Planes)
-   - [Container Registry](../../user-guide/ci/external-container-registry.mdx) (Switch to ECR/GCR/ACR)
    - [Observability](../../operations/observability-alerting.mdx) (Configure persistent OpenSearch and retention)
 
 ## Next Steps

docs/operations/deployment-topology.mdx

@@ -400,5 +400,4 @@ kubectl get dataplane <name> -n <organization-name> -o jsonpath='{.status.condit
 - [Environment API Reference](/docs/reference/api/platform/environment)
 - [Organization API Reference](/docs/reference/api/platform/organization)
 - [Multi-Cluster Connectivity](./multi-cluster-connectivity.mdx) - Step-by-step multi-cluster setup
-- [Container Registry](../user-guide/ci/external-container-registry.mdx) - Registry configuration for Build Plane
 - [Secret Management](./secret-management.mdx) - External secret store integration

docs/operations/secret-management.mdx

@@ -171,6 +171,5 @@ For detailed troubleshooting guidance, see the [ESO troubleshooting documentatio
 
 ## Next Steps
 
-- [Container Registry](../user-guide/ci/external-container-registry.mdx): Use External Secrets for registry credentials
 - [Deployment Topology](./deployment-topology.mdx): Configure SecretStore references in planes
 - [External Secrets Operator Documentation](https://external-secrets.io/): Complete ESO reference

sidebars.ts

@@ -110,7 +110,6 @@ const sidebars: SidebarsConfig = {
             'user-guide/ci/additional-resources',
             'user-guide/ci/private-repository',
             'user-guide/ci/private-repository-multiple',
-            'user-guide/ci/external-container-registry',
           ],
         },
         {