revert QFT and not crash the site

Codes.xml

@@ -1236,7 +1236,6 @@
         </source>
     </code>
     <code>
-        <id>qft</id>
         <category>timer</category>
         <title lang="en-US">Quarterframe Timer (Experimental)</title>
         <title lang="ja-JP">QFタイマー</title>

site/.vuepress/components/codes/codegen.js

@@ -1,5 +1,5 @@
 import InstantRestart from './InstantRestart/codegen.js';
-import qft from './qft_pending/codegen.js';
+import qft from './qft/codegen.js';
 
 export default {
   InstantRestart,