Someone at Apple has a sense of humor. From the support document titled Do not remove or modify SyncServices folder (emphasis mine):
As if it were a swarm of bees, you should stay away from the SyncServices folder in Mac OS X. Removing or modifying anything in it–or in subfolders within it–may cause unexpected issues.
Bees! I wonder what sort of sweet sweet honey will I find in the SyncServices folder?