There is no way to eliminate hep c antibodies. They are made by your own body as a part of your own bodies immune system to protect against a possible hep c infection.
Unfortunately, hep c antibodies are not effective in combating the hep c virus so they are not able to prevent future infection.
For example, if you either had the measles vaccine or were infected with measles in the past you now have measles antibodies. You will carry these antibodies for the rest of your life just as you will with hep c antibodies.
Having hep c antibodies only means you were once exposed to hep c in the past not if you are currently infected.
You will always test positive for Hepatitis c antibodies for the rest of your life. There is nothing that will change this.