Hello there, @sfoster ...
If you are unable to remove people from your Canvas course(s) yourself, you will need to reach out to your school's local Canvas administrator to see if he/she would be willing to help you with this. I searched your school's website, and I think I found a page that should be helpful (hopefully I have the correct school/site for you): Faculty Support for Canvas.
I hope this will be helpful to you, Stanley. Good luck to you!
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