fix(lb): remove tb pages from navigation (#4644)

Author: SamyOubouaziz

menu/navigation.json

@@ -3356,28 +3356,6 @@
                 "slug": "reference-content"
               },
               {
-                "items": [
-                  {
-                    "label": "I am having problems configuring my Load Balancer",
-                    "slug": "configuration"
-                  },
-                  {
-                    "label": "I am experiencing connection problems and HTTP errors with my Load Balancer",
-                    "slug": "http-connection-errors"
-                  },
-                  {
-                    "label": "I am having problems with my Load Balancer's certificate",
-                    "slug": "certificates"
-                  },
-                  {
-                    "label": "I am experiencing problems with my Kubernetes Load Balancer",
-                    "slug": "k8s-errors"
-                  },
-                  {
-                    "label": "Load Balancer Limitations",
-                    "slug": "load-balancer-limitations"
-                  }
-                ],
                 "label": "Troubleshooting",
                 "slug": "troubleshooting"
               }