fix(ui-merge): K4 — drop the fs/path imports the gallery test lost with its host-parity cases

Lint UI's package lint refused both (object-ui/no-unused-imports).

Claude-Session: https://claude.ai/code/session_01L9qibyMpJZ67jrDrno4jY1
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

ui/examples/schema-catalog/test/catalog-gallery-render.test.tsx

@@ -154,8 +154,6 @@ import { SidebarProvider } from '@object-ui/components';
 import { registerLayout } from '@object-ui/layout';
 import { ComponentRegistry } from '@object-ui/core';
 import { SchemaRenderer, SchemaRendererContext, toRenderableSchema } from '@object-ui/react';
-import fs from 'node:fs';
-import path from 'node:path';
 import { allExamples } from '../src/index.js';
 import { CATALOG_ENTRY_FLOOR } from './catalog-entry-floor.js';