Update specification/_config.yml

remove banner

specification/_config.yml

@@ -41,15 +41,6 @@ html:
   use_issues_button: true
   use_repository_button: true
   home_page_in_navbar: false
-  announcement: |
-    <div>
-      </style>
-        <h2><b>THIS SITE IS BEING MERGED</b></h2>
-        <h3>
-          The BIDS group is currently finalizing a NEW main website that will merge our existing websites into one central, easy to navigate resource. The <b><a href="https://bids-website.readthedocs.io" target="_blank">New BIDS Website</a> (https://bids-website.readthedocs.io)</b> is still being finalized, but we encourage feedback via the giscus form on the bottom of the main page.
-        </h3>
-        Please feel free to submit suggestions or comments as we improve and consolidate our existing BIDS resources.
-    </div>
 
 latex:
   latex_engine: xelatex