remove test related to old implementation

backend/src/test/kotlin/fr/gouv/cacem/monitorenv/domain/use_cases/missions/CreateOrUpdateMissionUTests.kt

@@ -156,61 +156,4 @@ class CreateOrUpdateMissionUTests {
             )
         assertThat(createdMission).isEqualTo(expectedCreatedMission)
     }
-
-    @Test
-    fun `should return the stored createAtUtc field When an update returned null createAtUtc`() {
-        // Given
-        val missionToUpdate =
-            MissionEntity(
-                id = 100,
-                missionTypes = listOf(MissionTypeEnum.LAND),
-                facade = "Outre-Mer",
-                geom = null,
-                startDateTimeUtc = ZonedDateTime.parse("2022-01-15T04:50:09Z"),
-                endDateTimeUtc = ZonedDateTime.parse("2022-01-23T20:29:03Z"),
-                isClosed = false,
-                missionSource = MissionSourceEnum.MONITORENV,
-                hasMissionOrder = false,
-                isDeleted = false,
-                isUnderJdp = false,
-                isGeometryComputedFromControls = false,
-            )
-
-        val returnedSavedMission =
-            MissionEntity(
-                id = 100,
-                endDateTimeUtc = ZonedDateTime.parse("2022-01-23T20:29:03Z"),
-                createdAtUtc = null,
-                updatedAtUtc = ZonedDateTime.now(),
-                facade = "La Face Ade",
-                hasMissionOrder = false,
-                isClosed = false,
-                isDeleted = false,
-                isGeometryComputedFromControls = false,
-                isUnderJdp = false,
-                missionSource = MissionSourceEnum.MONITORENV,
-                missionTypes = listOf(MissionTypeEnum.LAND),
-                startDateTimeUtc = ZonedDateTime.parse("2022-01-15T04:50:09Z"),
-            )
-
-        given(facadeAreasRepository.findFacadeFromGeometry(anyOrNull())).willReturn("La Face Ade")
-        given(missionRepository.findById(100))
-            .willReturn(missionToUpdate.copy(createdAtUtc = ZonedDateTime.parse("2022-01-23T20:29:03Z")))
-        given(missionRepository.save(anyOrNull()))
-            .willReturn(MissionDTO(mission = returnedSavedMission))
-
-        // When
-        val createdMission =
-            CreateOrUpdateMission(
-                missionRepository = missionRepository,
-                facadeRepository = facadeAreasRepository,
-                eventPublisher = applicationEventPublisher,
-            )
-                .execute(
-                    missionToUpdate,
-                )
-
-        // Then
-        assertThat(createdMission.createdAtUtc).isEqualTo(ZonedDateTime.parse("2022-01-23T20:29:03Z"))
-    }
 }