Dleleting Hyperlinks

Can you tell me how to delete hyperlinks. I know how to delete a singel one but not all of them at once? I’m not sure how they got on my spreadsheet but I have over 7500 lines that somehow got hyperlinks on them and the hyperlink needs to be removed. I did copie and paste did this cause this? And why did it put links where they don’t belong? Thanks Sandy And where do I go to get an answer? I’ve never done this before.
Thanks Again!!!! : )