fix : 테스트 수정

Author: EpicFn

src/test/java/org/tuna/zoopzoop/backend/domain/space/membership/service/NotificationServiceTest.java

@@ -6,17 +6,13 @@
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
-import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.ActiveProfiles;
-import org.springframework.transaction.annotation.Transactional;
 import org.tuna.zoopzoop.backend.domain.SSE.service.EmitterService;
 
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
 @ActiveProfiles("test")
-@SpringBootTest
-@Transactional
 @ExtendWith(MockitoExtension.class)
 class NotificationServiceTest {
     @Mock