(Reuters) – Chris Kirchner’s proposed acquisition of third-tier club Derby County is off after the American businessman withdrew his offer, the English Football League (EFL) said on Monday. Kirchner, who was named preferred bidder in April, was given conditional approval to buy the club last by the EFL month but he failed to meet Friday’s deadline to complete the purchase. The EFL said it had been notified that Kirchner had formally withdrawn from the process to buy Derby. “The League reiterates its commitment… to work proactively alongside the administrators of the club as they continue to …