Update guides.mdx

Author: fengjessica

dgraph/guides.mdx

@@ -9,5 +9,3 @@ import DgraphWIP from "/snippets/dgraph-wip.mdx"
 
 - [Get Started with Dgraph](/dgraph/guides/get-started-with-dgraph/introduction)
 - [Graph Data Models 101](/dgraph/guides/graph-data-models-101)
-- [Build a To-Do list app](/dgraph/guides/to-do-app/introduction)
-- [Build a Message Board app](/dgraph/guides/message-board-app/introduction)