Remove the old dashboard code

dashboard/vite.config.mjs

@@ -1,7 +1,6 @@
 import { defineConfig } from 'vite';
 import vue from '@vitejs/plugin-vue';
 import { resolve } from 'path';
-import { NodePackageImporter } from 'sass';
 
 // https://vitejs.dev/config/
 export default defineConfig({
@@ -37,15 +36,4 @@ export default defineConfig({
       },
     },
   },
-  // only exists since we also want to use sass to compile theme.css for oidc login views
-  css: {
-    preprocessorOptions: {
-      scss: {
-        api: 'modern-compiler',
-        importers: [ new NodePackageImporter() ],
-        quietDeps: true,
-        silenceDeprecations: [ 'import', 'global-builtin' ],
-      },
-    },
-  },
 });