Revert "PrimeVue version updates for stackblitz"

This reverts commit 4c2e56a9c5.

apps/showcase/components/doc/codeeditor/templates.js

@@ -2,7 +2,7 @@ import pkg from '../../../package.json';
 import { services } from './services';
 
 const PrimeVue = {
-    version: '^4.0.0-rc.2',
+    version: '^4.0.0-beta.4',
     description:
         'PrimeVue is an open source UI library for Vue featuring a rich set of 80+ components, a theme designer, various theme alternatives such as Material, Bootstrap, Tailwind, premium templates and professional support. In addition, it integrates with PrimeBlock, which has 400+ ready to use UI blocks to build spectacular applications in no time.'
 };
@@ -13,7 +13,6 @@ const core_dependencies = {
     vue: '^3.2.45',
     '@vitejs/plugin-vue': '^4.0.0',
     vite: '^4.0.0',
-    '@primevue/themes': PrimeVue.version || 'latest',
     primevue: PrimeVue.version || 'latest',
     primeicons: app_dependencies['primeicons'] || 'latest',
     tailwindcss: app_dependencies['tailwindcss'] || 'latest',