Currently Being ModeratedApr 2, 2012 12:30 AM (in response to Hundis)
It's not hard, just drag the Logic app icon to trash, empty the trash, and that's it.
You may also want to move Mainstage, Compressor, Waveburner, Logic Node, Soundtrack Pro and Apple Qmaster (depending on whether you had these installed along with Logic as a Logic Studio suite) to trash too.
After that you may search the hard-drive for any Logic-related items, and trash them too. Check <your HD>/Library/Application Support/Logic AND <your HD>/users/<your username>/Library/Application Support/Logic (this one should contain your preferences, apple loops, custom sound patches, temp files and undo data).
Apple Loops, Jam Packs and other Logic content (if you installed them all) could be found in: <your HD>/Library/Audio/Apple Loops/Apple/