The answer to your question is unfortunately no. A 1:1 backing means that the asset is backed by an equal value of another asset, so there is no other way to remove it. If you want to remove the 1:1 backing, you would need to find a way to replace the asset with something of equal value. This could involve selling the asset and using the proceeds to purchase something of equal value, or finding another asset to replace the one that is currently backed 1:1.