Energy Future Holdings Corp. will likely abandon the $18 billion sale of its Oncor power transmission company to an investor group led by Dallas billionaire Ray Hunt, the bankrupt power goliath told a bankruptcy judge Thursday. The deal was supposed to be Energy Future Holdings’ ticket out of bankruptcy court, where the case has lingered for two years at a cost to EFH estimated at $1 million a day in legal fees. The sale of Oncor could die within weeks unless the Texas Public Utility Commission…