I'm shocked that Japan does NOT have a judge for ladies OR men OR pairs at Worlds (pg. 6). Just ice dance. Same with Canada and France! (Also Austria, Estonia, Israel, but they don't strike me as as the Grand Prix host countries.)
USA has no ladies judge. Neither does Great Britain; both have the other three disciplines, though.
No ice dance judge (but have the other three disciplines): Russia, Switzerland and Bulgaria.
No pairs judge (but have other three disciplines): Australia
No men's judge (but have other three disciplines): Ukraine
Off the top of my head, some countries with no judge at all: Belgium, Denmark, Kazakhstan, Georgia, Latvia, Slovakia, Sweden.