docs: remove sample extension example

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot-Session: de4cb63f-4a85-432d-a722-697b33e9d49a

Author: edvilme

README.md

@@ -155,9 +155,7 @@ The Python Environments extension was built to provide a cohesive and user frien
 
 ### API Reference (proposed)
 
-See [api.ts](https://github.com/microsoft/vscode-python-environments/blob/main/src/api.ts) for the full list of Extension APIs.
-
-To consume these APIs you can look at the example here: [API Consumption Examples](https://github.com/microsoft/vscode-python-environments/blob/main/examples/README.md)
+See [api.ts](https://github.com/microsoft/vscode-python-environments/blob/main/src/api.ts) for the runtime API facade and [types.ts](https://github.com/microsoft/vscode-python-environments/blob/main/src/types.ts) for the public API contracts. Extension authors can consume these contracts from the `@vscode/python-environments` npm package.
 
 ### Callable Commands