In other words, you want to get rid of the audio from some clips?

You can right-mouse-button click on an audio event and choose Switches/Mute.

You can hover the mouse pointer near the top of the audio event until it changes into a hand with a crooked finger. Drag down and a blue line appears. The farther you drag it the quieter the audio will be. All the way down is silent.

You can click on an audio event, press U to ungroup it from the video, then delete it while leaving the video still there.

You could drag the audio to one of the other tracks, then mute that track instead of the main one.

You could insert a Volume Envelop on the audio track and add nodes to adjust the volume for individual sections.

Any of these methods should do it.