fix(banner): ChatCharacterBanner 엔티티의 isActive 속성 참조 오류 수정

- 사용하지 않는 메서드 제거

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/character/dto/ChatCharacterSearchResponse.kt

@@ -1,7 +1,6 @@
 package kr.co.vividnext.sodalive.admin.chat.character.dto
 
 import kr.co.vividnext.sodalive.chat.character.ChatCharacter
-import org.springframework.data.domain.Page
 
 /**
  * 캐릭터 검색 결과 응답 DTO
@@ -27,9 +26,5 @@ data class ChatCharacterSearchResponse(
                 tags = tags
             )
         }
-
-        fun fromPage(characters: Page<ChatCharacter>, imageHost: String): Page<ChatCharacterSearchResponse> {
-            return characters.map { from(it, imageHost) }
-        }
     }
 }

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/dto/ChatCharacterBannerResponse.kt

@@ -1,7 +1,6 @@
 package kr.co.vividnext.sodalive.admin.chat.dto
 
 import kr.co.vividnext.sodalive.chat.character.ChatCharacterBanner
-import org.springframework.data.domain.Page
 
 /**
  * 캐릭터 배너 응답 DTO
@@ -21,10 +20,6 @@ data class ChatCharacterBannerResponse(
                 characterName = banner.chatCharacter.name
             )
         }
-
-        fun fromPage(banners: Page<ChatCharacterBanner>, imageHost: String): Page<ChatCharacterBannerResponse> {
-            return banners.map { from(it, imageHost) }
-        }
     }
 }