Eddie Lampert and Bruce Berkowitz called off a potential joint bankruptcy deal for Sears Canada Inc., clearing the way for other bidders to challenge its two largest shareholders, MarketWatch.com reported on Friday. The two hedge-fund managers on Friday terminated a joint legal engagement ahead of an Aug. 31 bid deadline. ESL Partners LP, the hedge fund operated by Lampert, also said it might sell "some or all" of its 45.3 percent Sears Canada stake to generate a tax loss for its investors.