谢邀！
Good question!
Neither is correct.
People say only "never mind" nowadays. However, it was more common to say "never you mind" in the 1700s and 1800s, for example in Jane Austen novels.
I hope this is helpful.
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栗子的知乎答案索引：栗子树
栗子的微信公众号：E-Speller 或者 栗子英文 （只有精彩的原创）
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