By Alex Prewitt Despite calls to reinstate spots in bobsleigh and skeleton, there will be no sliding sport athletes from African delegations at the 2022 Games in Beijing. The guest of honor danced into camera view to a Nigerian afrobeat track, green beads in her braided hair and a bouquet of white balloons overhead. A green and white Nigerian flag hung on the wall behind her, framing an array of trophies, plaques, medals and her racing bib from her history-making skeleton run at the 2018 Winter Olympics. A towering green-and-white cake bore a warm message in frosting: CONGRATULATIONS SIMEDELET…