The facts are unclear. If you have a master calendar hearing, then your NTA was 'not canceled. If you leave the U.S. when you have an Immigration Court case, you can self deport yourself. This means that you can be stopped from returning to the U.S.
I strongly recommend that an experienced immigration attorney investigate. It is unclear whether your Immigration Court case was terminated. More research is needed.
The above is general information, not legal advice, and does not create an attorney client relationship.
If your green card is expired, traveling outside the U.S. would not be a good idea.
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