Revert "[DDW-796] Enable voting in all env for testing only"

This reverts commit 454c7e1.

Author: Lucas Araujo

source/renderer/app/stores/SidebarStore.js

@@ -81,7 +81,7 @@ export default class SidebarStore extends Store {
       [categories.STAKING_DELEGATION_COUNTDOWN.name]: false,
       [categories.STAKING.name]: true,
       [categories.SETTINGS.name]: true,
-      [categories.VOTING.name]: true,
+      [categories.VOTING.name]: isMainnet || isDev,
       [categories.NETWORK_INFO.name]: isFlight,
     };