Disable uglify the pretty way (#1351)

examples/using-preact/next.config.js

@@ -13,13 +13,7 @@ module.exports = {
 
     // Disable uglify. This has been fixed in https://github.com/developit/preact-compat/issues/155.
     // Can be removed once there is a new preact-compat release.
-    config.plugins = config.plugins.filter((plugin) => {
-      if (plugin.constructor.name === 'UglifyJsPlugin') {
-        return false
-      } else {
-        return true
-      }
-    })
+    config.plugins = config.plugins.filter((plugin) => (plugin.constructor.name !== 'UglifyJsPlugin'))
 
     return config
   }