Animal-rights advocates urged Mayor Zohran Mamdani to unilaterally ban Central Park’s iconic horse carriages after a teen tourist’s tragic death – as the hansom cabbies’ union suspended passenger rides through Monday. Carriage drivers will review procedures during the “safety stand-down” called by the Transport Workers Union of America Local 100 union Friday, as opponents of the horse-drawn rides renewed calls to shut down the industry for good in light of 18-year-old Romanch Mahajan’s death. “