Remove codepen due to web worker CORS issue

Author: jeromewu

README.md

@@ -24,18 +24,8 @@ Use FFmpeg directly in your browser without any backend services!!
   </a>
 </p>
 
-<a href="https://codepen.io/jeromewu/pen/NWWaMeY" target="_blank">
-<img alt="codepen" width="128px" src="https://blog.codepen.io/wp-content/uploads/2012/06/codepen-wordmark-display-inside-black@10x.png">
-</a>
-
 [Source Code](https://github.com/ffmpegjs/ffmpeg.js/blob/master/examples/browser/transcode.html)
 
-## Examples:
-
-| Name | Demo | Source Code |
-| ---- | ------- | ----------- |
-| Webcam | <a href="https://codepen.io/jeromewu/pen/qBBKzyW" target="_blank"><img alt="codepen" width="128px" src="https://blog.codepen.io/wp-content/uploads/2012/06/codepen-wordmark-display-inside-black@10x.png"></a> | [Link](https://github.com/ffmpegjs/ffmpeg.js/blob/master/examples/browser/webcam.html) |
-
 ## Supported Formats
 
 - mp4 (x264)