refactor: remove unreachable line

include/jvalidate/detail/idna_special_cases.h

@@ -61,7 +61,6 @@ inline bool is_jp(char32_t c) {
                              P{U'\U000323B0', U'\U0003347F'}, P{U'\uF900', U'\uFAFF'},
                              P{U'\u2E80', U'\u303F'},         P{U'\u31C0', U'\u31EF'}};
   return std::ranges::any_of(range, [c](P p) { return c >= p.first && c <= p.second; });
-  return (c >= U'\u3040' && c <= U'\u30FF') || (c >= U'\u4e00' && c <= U'\u9fff');
 }
 
 /**