I tried to Google this, for both Sweden and Germany, and the only thing I could find was comments on an internet forum post (I think a grooming forum) from 2001, in which they discussed that there was a rumor that whisker trimming wasn't allowed in Germany, and someone stated that this was not true, just a rumor being spread by a few people.
Obviously not real evidence, but there's no evidence being given towards it being illegal, either.
Photos I found of Poodles in those countries did not appear to be groomed differently than here. I couldn't really see if there were whiskers, but I can't see any way to shave the muzzle without shaving whiskers.