They’re walking away. America’s biggest cable provider has reportedly withdrawn its $45 billion bid for Time Warner Cable, after failing to convince regulators that it’d be good for media and Internet consumers. Comcast is expected to confirm the U-turn today, a move that stemmed from antitrust officials recommending a procedural hearing that almost certainly would’ve barred the merger. TWC, meanwhile, fought to resuscitate the deal until yesterday. While both sides lick their wounds, competitors like 21st Century Fox are breathing a sigh of relief.