Twitter deleted posts that included market-sensitive data from a U.S. oil-industry group after the group complained, roiling the tight-knit energy-trading community on the social network. The American Petroleum Institute recently sent a notice to the social network, alleging that several users had tweeted its weekly data on U.S. oil-inventory levels without authorization, according to documents reviewed by The Wall Street Journal. The documents show that Twitter has removed at least one post by an oil trader, and other…