✅ pr 리뷰 반영 - test code e.printStackTrace()삭제

Author: sehee123

backend/src/test/java/io/f1/backend/domain/game/app/RoomServiceTests.java

@@ -165,7 +165,7 @@ void exitRoom_synchronized() throws Exception {
                             log.info("room.getHost().getId() = {}", room.getHost().getId());
                             roomService.exitRoom(roomId, principal);
                         } catch (Exception e) {
-                            e.printStackTrace();
+
                         } finally {
                             SecurityContextHolder.clearContext();
                             countDownLatch.countDown();