chore: remove conductor.json shim

Conductor workspace setup is no longer needed - plugins handle hook
registration directly via plugin/hooks/hooks.json. The shim was copying
a stale settings.local.json into every worktree, registering dead hook
paths (save-hook.js, new-hook.js, summary-hook.js) that no longer exist.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

conductor.json

@@ -1,6 +0,0 @@
-{
-    "scripts": {
-        "setup": "cp ../settings.local.json .claude/settings.local.json && npm install",
-        "run": "npm run build-and-sync"
-    }
-}