* Cheetahs benefit: Cheetahs are incredibly fast hunters, but they often leave behind carcasses of their prey. This leaves a feast for vultures.
* Vultures benefit: Vultures, being scavengers, rely on carcasses for food. The cheetahs' leftovers provide them with a readily available food source.
* No harm to cheetahs: Vultures don't affect cheetahs negatively in any way. In fact, they might even help by cleaning up potential disease sources from the carcasses.
Therefore, the relationship is commensalism, where one species (vultures) benefits, while the other (cheetahs) is neither helped nor harmed.