From the school site you should be able to go to Courses and Sections. Choose the Course, then click on the section name/number. This should open the Edit Section screen. From there you should have the delete option at the bottom. If you don't have the password, you will not be able to delete the section and you will need to contact someone else at your site that does have access to delete sections.
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I have an additional question to your response above. I am an Administrator. Where do I find the Administrator Password? I tried my login password and it did not work. I cannot find anywhere that password is set up. No one in our district knows.
@Kluce18 This feels like one of those things like how to get to DDA--if you don't know someone shouldn't tell you.