Shoot us a message by clicking the "Have more questions? Reach out to us!" link at the bottom of this article. From there, select "Managing Music / Lyrics / Credits in Stores" and then select "I need to remove my release from specific stores".
If you change your mind later, you can always add your release back to any service(s) by selecting the "Add to more stores" on your album dashboard page.
Please note: Once your request is submitted, expect to wait up to 1-2 weeks to disappear from the selected streaming service(s), sometimes sooner.