Mayor Eric Adams’ top aide at City Hall has submitted his resignation — and couldn’t help but take a dig at incoming lefty Mayor Zohran Mamdani, The Post has learned.

“While I told the press months ago that, ‘I will never work for a socialist,’ the mayor-elect’s transition team needlessly included me (and you) last week on a list of 179 City Hall staffers it intends to replace on January 1, 2026,” Deputy Mayor Randy Mastro said in a letter to Adams on Friday.

“No need to have done so,” Mastro wrote. “We will be leaving city government together.”

Mastro, 69, who served as deputy mayor under Rudy Giuliani, was appointed to the same post by Adams in March after a slew of resignations over the mayors now quashed federal corruption case.

The ex-federal prosecutor has made no secret of his

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