If the hyperlink was created using the HYPERLINK function, you can remove the hyperlink by using the following steps:
Select the cell containing the hyperlink.
Press CTRL+C to copy the hyperlink.
Right Click and paste using the Values paste option.
Remove all hyperlinks at the same time
If you’re using Word or Outlook, or Excel 2010 or later, you can remove all hyperlinks in a file by using a keyboard shortcut.
In Word and Outlook:
Press Ctrl+A to select all text.
In Excel 2010 and later:
Select all cells that contain hyperlinks, or press Ctrl+A to select all cells.
Right-click, and then click Remove Hyperlinks.
Turn off automatic hyperlinks
In Office 2010 and later:
Click File > Options > Proofing