(Bloomberg) -- Oil storage locations across the Americas are emptying as the remarkable rally in crude prices undermines the need to buy and stockpile barrels.Tank owners were one of the few benefactors from last year’s collapse that spurred traders to buy crude cheap, store it, and then sell into a rally. Now that the market and shifted into backwardation, where oil for prompt delivery is priced higher than later-dated contracts, it’s making storage unprofitable. Gulf Coast terminal operators are offering to lease tanks at less than half the rate at the height of the storage boo...