remove 1.0 announcement banner (#490)

Summary:
subj

It's been more than 6 months, it's time.

Tested by building the website locally

Pull Request resolved: #490

Reviewed By: karthikprasad, romovpa

Differential Revision: D39173108

Pulled By: ffuuugor

fbshipit-source-id: 7e23ff2a462461250c8615979fd213703cc43c95

website/pages/en/index.js

@@ -43,18 +43,9 @@ class HomeSplash extends React.Component {
       </div>
     );
 
-    const Announcement = () => (
-      <div className="announcement">
-        <p>We are excited to announce the release of Opacus 1.0.</p>
-        <p>This release packs in lot of new features and bug fixes, and most importantly, also brings forth new APIs that are simpler, more modular, and easily extensible.</p>
-        <p>See our <a href="https://github.com/pytorch/opacus/releases/tag/v1.0.0">Release Notes</a> for more details. <a href="https://github.com/pytorch/opacus/blob/main/Migration_Guide.md" target="_blank">Migration Guide</a></p>
-      </div>
-    );
-
     const SplashContainer = props => (
       <div className="homeContainer">
         <AnnouncementSupportUkraine />
-        <Announcement />
         <div className="homeSplashFade">
           <div className="wrapper homeWrapper">{props.children}</div>
         </div>