How should I withraw a case?

jumhu

Registered Users (C)
Hi, I submitted two I-140 cases to CSC in July, one NIW and one EA. I-485 was submitted in August. NIW was approved last week. From online system, I found I-140 EA case got RFE. It seems there is no point to work on the RFE. What should I do to withdraw the EA case? Are there any issues that I need to be cautious. Thanks.
 
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