test(objectql): drop unused RESERVED_NAMESPACES import (CodeQL)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GwY68hKVysP98BX7i5eUoE

Author: claude

packages/objectql/src/registry.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, beforeEach, vi } from 'vitest';
-import { SchemaRegistry, applySystemFields, reconcileManagedApiMethods, computeFQN, parseFQN, RESERVED_NAMESPACES } from './registry';
+import { SchemaRegistry, applySystemFields, reconcileManagedApiMethods, computeFQN, parseFQN } from './registry';
 
 describe('SchemaRegistry', () => {
     let registry: SchemaRegistry;