Code clean up - remove unused headers from demuxer, unused ffmpeg dependencies, and redundent info from videodecode sample (#71)

[ROCm/rocdecode commit: 071b37b3bd]
2023-11-17 12:46:27 -05:00
@@ -20,7 +20,7 @@ This sample uses multiple threads to decode the same input video parallely.

 * [FFMPEG](https://ffmpeg.org/about.html)
  ```
-  sudo apt install ffmpeg libavcodec-dev libavformat-dev libswscale-dev
+  sudo apt install ffmpeg
  ```

 ## Build