Gov. Andrew Cuomo boasted, “I am not a superhero,” in early versions of his book, drafted as his aides scrubbed a politically damaging Health Department report. ALBANY, N.Y. — As the coronavirus subsided in New York last year, Gov. Andrew M. Cuomo had begun pitching a book proposal that would center on his image as a hero of the pandemic. But by early last summer, both his book and image had hit a critical juncture.