将下面的元素去重：[{"layer":"user","displayInfo":["userId","nickName","sellerType","qualificationInfoList","userRemarkTag"]},{"layer":"item","displayInfo":[]},{"layer":"creative","displayInfo":[]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":["creativeId"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","qualificationInfoList","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":[]}]
[{"layer":"user","displayInfo":["userId","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":[]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":[]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":[]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","catName"]}]
[{"layer":"user","displayInfo":["userId","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":["creativeId"]}]
[{"layer":"user","displayInfo":["userId","userTag","nickName","sellerType","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","catName"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","catName"]}]
[{"layer":"user","displayInfo":["userId","nickName","sellerType","isWhiteBrand","qualificationInfoList","userRemarkTag"]},{"layer":"item","displayInfo":[]},{"layer":"feed","displayInfo":["creativeId"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":["creativeId"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isWhiteBrand","userWhiteList","jhsTime","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["catName"]},{"layer":"feed","displayInfo":["creativeId"]}]
[{"layer":"user","displayInfo":["userId","targetUser","nickName","isWhiteBrand","userWhiteList","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","catName","itemId"]}]
[{"layer":"user","displayInfo":["userId","targetUser","userTag","nickName","sellerType","isBlackUser","isWhiteBrand","userWhiteList","qualificationInfoList","adReviewSheet","userRemarkTag"]},{"layer":"item","displayInfo":["linkUrls","title","subTitle","prop","catName"]},{"layer":"creative","displayInfo":[]}]