fix: 유저/관리자 캐릭터 이미지 리스트

- 불필요한 Response 제거

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/image/CharacterImageController.kt

@@ -55,7 +55,6 @@ class CharacterImageController(
                 imageUrl = url,
                 isOwned = isOwned,
                 imagePriceCan = img.imagePriceCan,
-                isAdult = img.isAdult,
                 sortOrder = img.sortOrder
             )
         }

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/image/dto/CharacterImageListDtos.kt

@@ -7,7 +7,6 @@ data class CharacterImageListItemResponse(
     @JsonProperty("imageUrl") val imageUrl: String,
     @JsonProperty("isOwned") val isOwned: Boolean,
     @JsonProperty("imagePriceCan") val imagePriceCan: Long,
-    @JsonProperty("isAdult") val isAdult: Boolean,
     @JsonProperty("sortOrder") val sortOrder: Int
 )