Need to unlink my iPhone from my iPod

Your iPhone and your iPod are not directly linked to one another, so there is no "unlinking" to do.

They may be using the same iTunes Library on your computer (or Finder on a recent Mac rather than iTunes), and/or they may both be signed into the same Apple Store account.

So my question is what are you trying to achieve?

• • do you want one of the devices to use a different library on a different computer?
  • do you want to sell (or give away) one device to someone else?
  • something else?

Dependant upon what you are trying to achieve, there will be a solution, but we need a better idea of what that is and why before we can point you in the right direction.