we do not need no stinkin constitutional amendment, we just need to lawfully apply the one we have! Same goes for the 16th Amendment & the IRS!!!
Now if you want to repeal an amendment, it should be the 17th Amendment that infringed on the state legislatures right to select their representatives in Congress.
If the courts rule that such a law is unconstitutional, then an amendment would be necessary. It would not entail abolishing the 14th amendment.