Other than naming sections with a heading label that would allow you to easily identify and delete them in Outline view, the only other idea that occurs to me, is using a separate Style. If you are not familiar with styles, you'll need to look up this option in Help, but here's a starter:

Everything you enter in a Word document has a style attached. A style is a group of formats applied all together; a little package of formats with a label on it. If you open Word "out of the box", and simply begin typing, your words will be in Normal style.

If you don't apply other styles, that's what you get. Let's say that's the case, and it's 11 pt Times New Roman font, with "automatic" as the color applied. You can create another style that looks exactly the same but has a different name. (Look up creating styles from existing ones.) Apply this new style to the sections you wish to be able to delete easily.

When you need to delete, use Word's Find and Replace to replace that style with nothing. (Again, look up replacing styles.)