Is there an easier way to eliminate all hyperlinks without saving a file as text and re-importing or manually removing them one by one?
If your question is only about Writer, please, choose retag (below your question), delete the actual tags, type writer and press Enter twice. Thanks.
The common tag is for all LibreOffice modules (Writer, Calc, Draw, etc.). The meta tag is for matters related to this site.
Writer answer:
Select all text, secondary click, and select Remove Hyperlink.