It's been said before: most of the simple phrases that go well on a dart shirt are things we've overheard playing darts at someplace or another. And this one has been waiting in line to go on a dart shirt for a few months.
After getting them setup, I Googled around for the exact phrase You Don't Need Luck If You're Good and could not find a solid reference to who may have said it in the movies or penned the phrase in any song lyrics. And I don't actually recall who said it during a dart tournament I attended a few months back. So make it your quote the next time you're headed to the boards!