Revert "fix: getProfile NPE 수정 및 updatePersonalInfo 트랜잭션 추가"

This reverts commit b8898eb.

Author: Superkid0714

src/main/java/guesthouse/user/service/UserService.java

@@ -4,7 +4,6 @@
 import guesthouse.certificate.repository.CertificateRepository;
 import guesthouse.user.domain.model.User;
 import guesthouse.user.domain.vo.Gender;
-import guesthouse.user.domain.vo.PersonalInfo;
 import guesthouse.user.dto.ProfileDTO;
 import guesthouse.user.exception.UserErrorCode;
 import guesthouse.user.exception.UserException;
@@ -29,7 +28,6 @@ public User findById(Long id) {
                 .orElseThrow(() -> new UserException(UserErrorCode.NOT_FOUND));
     }
 
-    @Transactional
     public void updatePersonalInfo(String name,
                                    String phoneNumber,
                                    LocalDate birthDate,
@@ -49,9 +47,8 @@ public ProfileDTO getProfile(Long userId) {
         boolean hasInReview = certificates.stream()
                 .anyMatch(certificate -> certificate.getStatus().isInReview());
 
-        PersonalInfo personalInfo = user.getPersonalInfo();
         return new ProfileDTO(
-                personalInfo != null ? personalInfo.getName() : null,
+                user.getPersonalInfo().getName(),
                 user.getProfileImageUrl(),
                 isOwner,
                 hasInReview