chore: remove legacy rpc command

docs/rpc.md

@@ -1,41 +0,0 @@
----
-summary: "JSON RPC contract used by the mac app to talk to the gateway"
-read_when:
-  - Changing mac app RPC or agent toggles
----
-# Clawdis Agent RPC
-
-Live, stdin/stdout JSON RPC used by the mac app (XPC) to avoid spawning `clawdis agent --json` for every send and to toggle runtime features (e.g., heartbeats) without restarting the gateway.
-
-## How it is launched
-- The mac app starts `clawdis rpc` in the configured project root (`CommandResolver.projectRoot()`, defaults to `~/Projects/clawdis`).
-- Environment PATH is augmented with repo `node_modules/.bin`, pnpm home, /opt/homebrew/bin, /usr/local/bin.
-- Process is kept alive; crashes are handled by the app’s RPC helper restarting it.
-
-## Request/response protocol (newline-delimited JSON)
-### Requests (stdin)
-- `{"type":"status"}` → health ping.
-- `{"type":"send","text":"hi","session":"main","thinking":"low","deliver":false,"to":"+1555..."}` → invokes existing agent send path.
-- `{"type":"set-heartbeats","enabled":true|false}` → enables/disables web heartbeat timers in the running gateway process.
-
-### Responses (stdout)
-- `{"type":"result","ok":true,"payload":{...}}` on success.
-- `{"type":"error","error":"..."}` on failures or unsupported commands.
-
-Notes:
-- `send` reuses the agent JSON payload extraction; `payload.payloads[0].text` carries the text reply when present.
-- Unknown `type` returns `error`.
-
-## Heartbeat control (new)
-- The mac menu exposes “Send heartbeats” toggle (persisted in UserDefaults).
-- On change, mac sends `set-heartbeats` RPC; the gateway updates an in-memory flag and short-circuits its heartbeat timers (`web-heartbeat` logging + reply heartbeats).
-- No gateway restart required.
-
-## Fallbacks / safety
-- If the RPC process is not running, mac-side RPC calls fail fast and the app logs/clears state; callers may fall back to one-shot CLI where appropriate.
-- PATH resolution prefers a real `clawdis` binary, otherwise node + repo `bin/clawdis.js`, otherwise pnpm `clawdis`.
-
-## Future extensions
-- Add `abort` to cancel in-flight sends.
-- Add `compact` / `status --verbose` to return gateway internals (queue depth, session info).
-- Add a JSON schema test for the RPC contract.