Chore: todo 삭제

Author: stoneTiger0912

src/main/java/flipnote/group/adapter/in/web/MemberController.java

@@ -65,6 +65,4 @@ public ResponseEntity<Void> kickGroupMember(
 
 		return ResponseEntity.noContent().build();
 	}
-
-	//todo 가입 신청 허가
 }