Revert "chore(): add event announce"

This reverts commit 209899e.

Author: rdlabo

docusaurus.config.js

@@ -32,7 +32,7 @@ module.exports = {
     announcementBar: { // toggle display:** at src/styles/custom.scss
       id: 'announcement-bar',
       content:
-        '<a href="https://nishinomiya.connpass.com/event/367811/" target="_blank" rel="noopener">イベント「ユーザ認証再入門。ログイン機構を見直そう」 / 9月21日（日）開催</a>',
+        '<a href="https://nishinomiya.connpass.com/event/351893/" target="_blank" rel="noopener">「そのリファクタ、なぜ必要？理由付きで見せます！」 / 4月29日（火）開催</a>',
       isCloseable: false,
     },
     colorMode: {

src/styles/custom.scss

@@ -5,7 +5,7 @@
 
   [class*='announcementBar_'] {
     background: radial-gradient(circle, rgba(58, 99, 255, 1), rgba(42, 179, 252, 1) 90%);
-    //display: none;
+    display: none;
 
     &:hover,
     &:focus,