Here's the original answer and then I'll explain it.
Unfortunately, once you have embedded a Studio video into your course, you cannot remove the comments...at least there is no interface that allows you to toggle the comments on/off within the embed. What you have to do is to remove the Studio from the page and then re-add the Studio video...this time being sure to keep the toggle switch turned off that allows for comments. Then, the Studio video will display without the comments interface for you like you want.
Take the video out of your course. (If you have it in studio, you can just delete it.)
Now click on the icon that allows you to embed videos from Canvas Studio. When you click on your video, toggle off the embed option to display media tabs. (They should have labeled this differently.) Now click embed at the bottom of the pop up menu. That should work.
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