feat: remove polyfills

features are now supported by baseline browsers

frontend/vite.config.ts

@@ -100,18 +100,7 @@ export default defineConfig(({mode}) => {
 				plugins: [
 					postcssEasings(),
 					postcssEasingGradients(),
-					postcssPresetEnv({
-						// Since postcss-preset-env v8.0.0 the 'enableClientSidePolyfills' option is disabled by default.
-						// This is the list of features that require a client side library:
-						// https://github.com/csstools/postcss-plugins/tree/main/plugin-packs/postcss-preset-env#plugins-that-need-client-library
-						// Since we only use 'focus-within-pseudo-class' we have to force enable
-						// that plugin now manually in order to keep the browser support as it was.
-						// See also './src/polyfills.ts'
-						features: {
-							'focus-within-pseudo-class': true,
-							'has-pseudo-class': true,
-						},
-					}),
+					postcssPresetEnv(),
 				],
 			},
 		},