del: onboarding Flag from social login API

src/main/java/com/fullcar/member/application/auth/AuthServiceProvider.java

@@ -43,7 +43,6 @@ public AuthResponseDto socialLogin(SocialInfoResponseDto socialResponseDto) {
         String accessToken = jwtTokenProvider.generateAccessToken(member);
 
         return AuthResponseDto.builder()
-                .onBoardingFlag(member.isFlag())
                 .accessToken(accessToken)
                 .refreshToken(socialResponseDto.getRefreshToken())
                 .build();

src/main/java/com/fullcar/member/domain/member/Member.java

@@ -45,10 +45,6 @@ public class Member {
 
     private Gender gender;
 
-    @Builder.Default
-    @Column(name = "onboarding_flag")
-    private boolean flag = false;
-
     @Builder.Default
     @Column(name = "is_deleted")
     private boolean isDeleted = false;

src/main/java/com/fullcar/member/presentation/auth/dto/response/AuthResponseDto.java

@@ -8,9 +8,6 @@
 @Builder
 public class AuthResponseDto {
 
-    @Schema(description = "멤버 온보딩 여부")
-    private Boolean onBoardingFlag;
-
     @Schema(description = "FullCar Access Token")
     private String accessToken;