The signatures of two dead Brooklyn voters appeared on a Democratic candidate’s nominating petitions — and now she’s at risk of being kicked off the primary ballot, The Post has learned. State Assembly candidate Marie Mirville-Shahzada and her slate of Democratic district leaders can get axed from the primaries on Coney Island because a mind-boggling 90% of her 5,258 total signatures have been invalidated by the city Board of Elections. Some 3,000 people who supposedly signed the petitions — which are required to run for office — lived out of the district or were not registered to vote. State Assembly candidate Marie Mirville-Shahzada could be removed from the Democratic primary. Marie4ThePeople A review of signature petitions by The Post confirmed that at least two signatures are of dead voters while a third signature is from a woman whose family said she wasn’t even in the Big Apple on the day she allegedly put her John Hancock on the form.…