MIAMI — A Miami Heat roster largely locked in by luxury-tax constraints came together as expected at Saturday’s NBA cutdown deadline. From the NBA limit of 21 players during the preseason, the Heat trimmed to 14 under standard contract and three under two-way deals. The moves leave the Heat with an open roster spot, with the Heat lacking comfortable payroll wherewithal to remain under the highly punitive second apron of the luxury tax with the maximum of 15 under standard contract. Waived Saturday by the Heat were veteran wing Nassir Little, undrafted guards Isaiah Stevens and Zyon Pullin, as well as undrafted center Warren Washington. The latter three are expected to land with the Heat’s G League affiliate, the Sioux Falls Skyforce.