docs: #67 예정 작업 취소에 따른 TODO 주석 제거

src/main/java/com/ajou/hertz/domain/instrument/dto/request/InstrumentFilterConditions.java

@@ -13,7 +13,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @Setter    // for @ModelAttribute
 @Getter
-public class InstrumentFilterConditions {    // TODO: abstract class로 전환
+public class InstrumentFilterConditions {
 
 	private InstrumentProgressStatus progress;