A family of Microsoft word processing software products for creating web, email, and print documents.
I would hope that you applied the numbering using the methods shown at How to create numbered headings or outline numbering in Ribbon Versions of Word by Shauna Kelly.
Can you modify the style to remove the numbers [and indents]?
In each such style you've used, you modify the style.
Choose Format on the modify dialog and then Numbering. Click on None and OK. That will remove the numbering settings for that style.
If your numbering is not through styles, i.e., applied directly using the buttons, I expect it could be cleared using vba but that is beyond my competence.