Yoel Romero ensured Melvin Manhoef will not get his happy ending. “The Soldier of God” scored a devastating third-round knockout of Manhoef on Friday in the co-main event of Bellator 285, which took place at the 3Arena in Dublin, Ireland. After a measured first two rounds, Romero (15-6) upped his activity in Round 3, taking his 46-year-old foe down along the fence, then blasting him with huge punches and elbows that ultimately left Manhoef unconscious on the mat. The official time of the stoppage was 3:34 of the final round. Afterward, Manhoef announced his retirement from MMA. Watch replay of…