取出代码中多余的引用类

cqb-paper/src/main/java/com/qmth/cqb/paper/service/ExtractConfigServiceImpl.java

@@ -20,7 +20,6 @@ import org.springframework.data.mongodb.core.query.Criteria;
 import org.springframework.data.mongodb.core.query.Query;
 import org.springframework.stereotype.Service;
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 
 import cn.com.qmth.examcloud.common.dto.question.PaperDetailDto;
 import cn.com.qmth.examcloud.common.dto.question.PaperDetailUnitDto;
@@ -34,7 +33,6 @@ import com.qmth.cqb.paper.dao.ExtractConfigRepo;
 import com.qmth.cqb.paper.dao.PaperDetailRepo;
 import com.qmth.cqb.paper.dao.PaperDetailUnitRepo;
 import com.qmth.cqb.paper.dao.PaperRepo;
-import com.qmth.cqb.paper.dto.PaperDetailUnitExp;
 import com.qmth.cqb.paper.model.ExamPaper;
 import com.qmth.cqb.paper.model.ExtractConfig;
 import com.qmth.cqb.paper.model.Paper;