Sony’s flagship noise-canceling WH-1000XM5 headphones are $100 off The WH-1000XM5 may not fold up like their prior version, but they’re the best around for performance. | Photo by Chris Welch / The VergeIf you’re feeling the post-Fourth of July holiday hangover today, we’ve got some deals to help distract you. While Amazon’s upcoming Prime Day may bring bigger savings for Prime subscribers in less than one week…