Drop untranslated zh_TW Support BIPs page after adding a redirect

Author: harding

_posts/en/pages/2016-01-13-supported-bips.md

@@ -7,6 +7,8 @@ lang: en
 permalink: /en/bips/
 share: false
 version: 2
+redirect_from:
+  - /zh_TW/bips/
 ---
 Bitcoin Core supports the following [BIPs][BIP1].