very easy to do.
Simply link those audio files to the slides you don't want.
Then in Slide View delete the Slides, the audio files will be deleted along with the Slides.
I would first move the audio clip on Track 2 to the right to roughly where you want it under Slide 6
Or you could delete those audio files from Track 1 first & then delete the 5 Slides.
Again reposition Track 2 first
Jill