chore: update readme

Author: aallam

README.md

@@ -24,12 +24,6 @@ Execbox turns host tool catalogs into callable guest namespaces, supports MCP wr
 
 Runnable examples live in [`examples/`](./examples/) and are indexed in [`examples/README.md`](./examples/README.md).
 
-## Choosing a Runtime
-
-- Start with `@execbox/quickjs` for trusted code and the smallest setup.
-- Use `new QuickJsExecutor({ host: "worker" })` when you want QuickJS off the main thread with pooled worker shells.
-- Use `@execbox/remote` when your application owns a process, container, VM, or network boundary for the runtime.
-
 ## Docs
 
 - [Public Docs](https://execbox.aallam.com)