Usually prople brick their wii when trying to remove stuff to be honest - they always seem to pick a system file and delete it and bang goes their wii - if it dont do any harm let it there.
Waninkokos iso downgrader also lets you update so you can pick the 3.4 and install that - it was on his site , not sure if it still is , but ill be doing up a new pack soon and it will be in it.