docs: remove advanced configuration section from helm guide

Author: ZIJ

docs/ce/self-host/deploy-helm.mdx

@@ -262,87 +262,3 @@ description: "Learn how to use Helm chart to install Digger on your Kubernetes c
      - Verify SSL certificates are valid
 </Accordion>
 
-## Advanced Configuration
-
-<Accordion title="Using existing secrets">
-  If you prefer to manage secrets separately, you can reference an existing Kubernetes secret:
-  
-  ```yaml values.yaml
-  digger:
-    secret:
-      useExistingSecret: true
-      existingSecretName: "digger-secrets"
-  ```
-</Accordion>
-
-<Accordion title="Resource configuration">
-  Configure resource limits and requests:
-  
-  ```yaml values.yaml
-  digger:
-    resources:
-      requests:
-        cpu: 100m
-        memory: 128Mi
-      limits:
-        cpu: 500m
-        memory: 512Mi
-  ```
-</Accordion>
-
-<Accordion title="Full values.yaml example">
-  ```yaml values.yaml
-  digger:
-    image:
-      repository: registry.digger.dev/diggerhq/digger_backend
-      tag: "v0.6.106"
-      pullPolicy: IfNotPresent
-    
-    service:
-      type: ClusterIP
-      port: 3000
-    
-    ingress:
-      enabled: true
-      host: "digger.example.com"
-      annotations:
-        kubernetes.io/ingress.class: "nginx"
-        cert-manager.io/cluster-issuer: "letsencrypt-prod"
-    
-    secret:
-      httpBasicAuthUsername: "admin"
-      httpBasicAuthPassword: "secure-password-123"
-      bearerAuthToken: "secure-bearer-token-456"
-      hostname: "https://digger.example.com"  # Include https:// prefix
-      
-      githubOrg: "your-github-org"
-      githubAppID: "123456"
-      githubAppClientID: "Iv1.abc123def456"
-      githubAppClientSecret: "github_app_client_secret"
-      githubAppKeyFile: "LS0tLS1CRUdJTi..."
-      githubWebhookSecret: "webhook_secret"
-    
-    postgres:
-      user: "digger"
-      database: "digger"
-      host: "postgresql.example.com"
-      password: "postgres-password"
-      sslmode: "require"
-    
-    resources:
-      requests:
-        cpu: 100m
-        memory: 128Mi
-      limits:
-        cpu: 500m
-        memory: 512Mi
-  
-  # For testing only - use external database in production
-  postgres:
-    enabled: false
-    # If you enable the built-in postgres:
-    # secret:
-    #   useExistingSecret: false
-    #   password: "test-password"
-  ```
-</Accordion>