Profiles in the consumer scale's cannot be removed (except for the RD-545HR, BC-333LE and BC-401, instructions below), but they can be modified. To modify the user profile in your scale, you can follow the steps in the scale's instruction manual on the page 'how to set a profile'. The instruction manual of the scale can be downloaded from the product page on the website.
How can I delete a user profile from my RD-545 HR?
How can I delete a user profile from my BC-333 LE?