There is an option to import Audio only, Video Only, during importing clips in your timeline. You can insert video only.
If you want to remove audio from any clip on your timeline then you can simply lock the video track. Now select the clip and press the delete button. The video track is locked so only the audio of the selected clip will be deleted.
You can also use detach audio option using your timeline tool or simply right-click on the clip.
One thing more I want to add as per my personal experience. If there is any chance to reuse the audio then don't delete or remove it from timeline. You can disable that audio/ audio track or simply turn down the volume to zero.