No reason to even bother, although if you want to do things properly, you should inform the Urzad Miasta, the Foreigners Office, ZUS and the Urzad Skarbowy.
There certainly is when it comes to ZUS if one has been running a one-person company! I knew of one poor bloke who was here but left before he properly started his company (i.e. left before registration was complete and didn't issue even a single invoice); when he came back a few years later, ZUS presented him with a bill for a few years' ZUS payments and he had to leave again.