Update docusaurus.config.js (#5531)

Remove announcement banner

Author: kimsauce

docusaurus.config.js

@@ -245,12 +245,6 @@ module.exports = {
         name: 'msvalidate.01', content: 'BA6FBE48309F6E1CFFD055E769857586'
       },
     ],
-    announcementBar: {
-      id: 'maintenance',
-      content: 'Help Docs will undergo scheduled maintenance on Fri, 6/27 from 5-6 PM PT. Service may be briefly disrupted. We apologize for any inconvenience.',
-      backgroundColor: '#fafbfc',
-      textColor: '#091E42',
-    },
     imageZoom: {
       selector: '.markdown :not(a) > img',
       // Optional medium-zoom options