docs: Remove stale useThink guidance

Author: aron-cf

docs/01_vfs.md

@@ -34,16 +34,10 @@ Workspace where `fs` works against the local SQLite store but
 `shell` throws.
 
 `WorkspaceOptions` includes the storage handle, optional backends,
-clock, session id, mounts, observer, git identity, assets, artifacts,
-and `useThink`. There is no `root` or `sandbox` field on the host
-facade — sandbox wiring lives behind a `WorkspaceBackend`.
-
-Set `useThink: true` when assigning the Workspace to
-`Think.workspace`. This adds Think's string-oriented filesystem
-compatibility methods (`readFile`, `readFileBytes`, `writeFile`,
-`readDir`, `rm`, `glob`, `mkdir`, and `stat`) to that Workspace and to
-clients returned by `getWorkspace()`, while leaving the primary API on
-`workspace.fs`.
+clock, session id, mounts, observer, git identity, assets, and artifacts.
+There is no `root` or `sandbox` field on the host facade — sandbox wiring
+lives behind a `WorkspaceBackend`. Think integrations use `workspace.fs`
+and `@cloudflare/computer/tools` directly.
 
 Illustrative layout (nothing below `/` is auto-created beyond
 `ROOT_INODE` itself):

packages/computer/README.md

@@ -465,9 +465,9 @@ await ws.ready();
 const stub = ws.stub();  // crosses the Workers-RPC boundary
 ```
 
-When assigning a workspace to a Think agent's `workspace`, pass
-`useThink: true` so Think's compatibility methods are added alongside
-`workspace.fs` and `workspace.runtime`.
+Think integrations use `workspace.fs`, `workspace.runtime`, and
+`@cloudflare/computer/tools` directly. The legacy root-level filesystem
+compatibility methods are not available.
 
 ### Durable pending-sync retries