fix: add NODE_ENV for Icon warning (#43574)

components/icon/index.ts

@@ -1,7 +1,9 @@
 import warning from '../_util/warning';
 
 const Icon: React.FC = () => {
+  if (process.env.NODE_ENV !== 'production') {
     warning(false, 'Icon', 'Empty Icon');
+  }
   return null;
 };