Default [Q]Unrooting Voodoo

I tried searching but wasn't really able to get a clear answer. From what I understand if I flash a stock ed1 rom and update to ed2 then it should remove root, but do I have to do anything special to remove voodoo lagfix or cwm? Specifically I'm running the pbj lagfix kernel with GummyCharged ee4. Will the method I've described even work? Thanks in advance.

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