Remove Langsmith-observability stack from docs

src/docs.json

@@ -839,8 +839,7 @@
                       "group": "Self-hosted observability",
                       "pages": [
                         "langsmith/export-backend",
-                        "langsmith/langsmith-collector",
-                        "langsmith/observability-stack"
+                        "langsmith/langsmith-collector"
                       ]
                     },
                     {

src/langsmith/export-backend.mdx

@@ -39,15 +39,15 @@ You can use a [Prometheus](https://prometheus.io/docs/prometheus/latest/getting_
 
 ## Frontend Nginx
 
-The frontend service exposes its Nginx metrics at the following endpoint: `langsmith-frontend.langsmith.svc.cluster.local:80/nginx_status`. You can either scrape them yourself, or bring up a Prometheus Nginx exporter using the [LangSmith Observability Helm Chart](/langsmith/observability-stack)
+The frontend service exposes its Nginx metrics at the following endpoint: `langsmith-frontend.langsmith.svc.cluster.local:80/nginx_status`. You can either scrape them yourself, or bring up a [Prometheus Nginx exporter](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-nginx-exporter).
 
 <Warning>
 **The following sections apply for in-cluster databases only. If you are using external databases, you will need to configure exposing and fetching metrics.**
 </Warning>
 
 ## Postgres + Redis
 
-If you are using in-cluster Postgres/Redis instances, you can use a Prometheus exporter to expose metrics from your instance. You can deploy your own, or if you would like, you can use the [LangSmith Observability Helm Chart](/langsmith/observability-stack) to deploy an exporter for you.
+If you are using in-cluster Postgres/Redis instances, you can use a Prometheus exporter to expose metrics from your instance. You can deploy a [Postgres exporter](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-postgres-exporter) and/or [Redis exporter](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-redis-exporter).
 
 ## Clickhouse