To remove the audio track into Avidemux
- Open in Avidemux the Video from which the audio track you want to remove. Then go to the menu bar, click "Audio" and click on "Select Track".
- In the following window, you can disable the Track. Remove the check mark next to "Enabled". If the Video has multiple languages, you can remove the audio tracks specifically.
- Save the Video by clicking in the menu bar under "File" and "Save".

Avidemux: audio track remove
You don't have enough storage space? So you can Videos be significantly smaller.