Remove redundant ASCII architecture diagram

README.md

@@ -43,25 +43,6 @@ flowchart TB
     class A1,A2,A3,A4,A5,A6,AN,AX agent;
 ```
 
-```text
-frontends (shell, Acme, KDE, scripts)
-                         │ 9P
-                         ▼
-                    olliesrv
-                 ┌──────┼──────┐
-              sessions agents  fs tree
-                         │
-                    agent loop
-                         │
-                 provider backends
-                         │
-                    toolsrv (9P)
-                    ┌────┴────┐
-                 tools     sandbox
-                              │
-                         bypass broker
-```
-
 ## Runtime model
 
 - `olliesrv` owns the in-memory 9P tree and session collection.