remove prebuilt style for colors

apps/app/src/pages/_app.page.tsx

@@ -21,7 +21,6 @@ import { registerTransformerForObjectId } from './utils/objectid-transformer';
 import '~/styles/prebuilt/vendor.css';
 import '~/styles/font-icons.scss';
 import '~/styles/style-app.scss';
-import '~/styles/prebuilt/colors.css';
 
 
 const isDev = process.env.NODE_ENV === 'development';

apps/app/src/styles/colors/colors.scss

@@ -1,3 +0,0 @@
-@use '@growi/core/scss/bootstrap/init' as *;
-
-@import 'bootstrap/scss/root';

apps/app/vite.styles-prebuilt.config.ts

@@ -7,7 +7,6 @@ export default defineConfig({
     outDir: 'src/styles/prebuilt',
     rollupOptions: {
       input: [
-        '/src/styles/colors/colors.scss',
         '/src/styles/vendor.scss',
       ],
       output: {