Docs: remove outdated graph examples (#655)

* fix-prereqs-link

* add-page-aliases

* remove-pages

* remove-other-data

* remove-kg-nav-content

* remove-passthrus

Author: mendonk

docs/modules/ROOT/nav.adoc

@@ -40,8 +40,6 @@
 * xref:examples:hcd.adoc[]
 * xref:examples:dse-69.adoc[]
 * xref:examples:colbert.adoc[]
-* xref:examples:knowledge-graph.adoc[]
-* xref:examples:knowledge-store.adoc[]
 * xref:examples:langchain_multimodal_gemini.adoc[]
 * xref:examples:nvidia_embeddings.adoc[]
 * xref:examples:hotels-app.adoc[]

docs/modules/examples/pages/index.adoc

@@ -76,10 +76,6 @@ We're actively updating this section, so check back often!
 | https://colab.research.google.com/github/datastax/ragstack-ai/blob/main/examples/notebooks/RAGStackColBERT.ipynb[Open in Colab]
 | xref:colbert.adoc[]
 
-| Extract and traverse graphs with the ragstack-ai-knowledge-graph library and CassIO.
-| https://colab.research.google.com/github/datastax-labs/knowledge-graphs-langchain/blob/main/notebook.ipynb[Open in Colab]
-| xref:knowledge-graph.adoc[]
-
 | Implement a generative Q&A over your own documentation with {db-serverless} Search, OpenAI, and CassIO.
 | https://colab.research.google.com/github/datastax/ragstack-ai/blob/main/examples/notebooks/QA_with_cassio.ipynb[Open in Colab]
 | xref:qa-with-cassio.adoc[]