remove stub pages (#99)

Author: lnhsingh

src/langgraph-platform/faq.mdx

@@ -59,7 +59,7 @@ Yes! LangGraph is totally ambivalent to what LLMs are used under the hood. The m
 
 ## Can I use LangGraph Studio without logging in to LangSmith
 
-Yes! You can use the [development version of LangGraph Server](../tutorials/langgraph-platform/local-server) to run the backend locally.
+Yes! You can use the [development version of LangGraph Server](/langgraph-platform/local-server) to run the backend locally.
 This will connect to the studio frontend hosted as part of LangSmith.
 If you set an environment variable of `LANGSMITH_TRACING=false`, then no traces will be sent to LangSmith.