chore: remove outdated AIEB benchmark (#99)

The benchmark/ suite was an early Hermes-vs-odek comparison and no
longer reflects the project. Remove it entirely, along with its
mentions in AGENTS.md, the landing page (hero stat, carousel slide,
meta keywords), and the .dockerignore entry.

Author: jkyberneees

.dockerignore

@@ -8,4 +8,3 @@ odek-bin
 .hermes/
 docker/.env
 docker/workspace/
-benchmark/

AGENTS.md

@@ -11,7 +11,6 @@ It provides context about the project's architecture, conventions, and how to up
 - **What it is:** Minimal Go autonomous agent runtime — ReAct (Reasoning + Acting) loop with zero frameworks (stdlib + a few focused packages).
 - **Binary:** `odek` — single static binary, ~12 MB, instant startup.
 - **Config:** Five-layer priority: `~/.odek/secrets.env` → `~/.odek/config.json` → `./odek.json` → `ODEK_*` env vars → CLI flags.
-- **Benchmark:** AIEB v2.0 — 80.3% (highest published agent score on the Autonomous Intelligence Engineering Benchmark).
 - **Releases:** see [GitHub Releases](https://github.com/BackendStack21/odek/releases) for the current version and changelog.
 
 ## Source Layout
@@ -78,7 +77,6 @@ internal/
   transport/                  Shared HTTP transport with connection pooling
   ws/                         RFC 6455 WebSocket framing
 docs/                         Documentation (CLI, API, CONFIG, MCP, MEMORY, TELEGRAM, SECURITY, etc.)
-benchmark/                    AIEB v2.0 benchmark suite (9 tasks, 4 tiers, automated scoring)
 ```
 
 ## How It Works