repair modify error

ad-engine-service/src/main/java/com/tzld/piaoquan/ad/engine/service/score/impl/RankServiceImpl.java

@@ -10,7 +10,6 @@ import com.tzld.piaoquan.ad.engine.service.score.FeatureRemoteService;
 import com.tzld.piaoquan.ad.engine.service.score.RankService;
 import com.tzld.piaoquan.ad.engine.service.score.convert.RequestConvert;
 import com.tzld.piaoquan.ad.engine.service.score.param.RankRecommendRequestParam;
-import javafx.util.Pair;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;