From Mike Puma: Brian Bruney isn't launching a campaign to keep his eighth-inning job.The inconsistent Yankee reliever yesterday stopped short of saying he'd welcome a new role, but also made it known he wouldn't lose sleep if manager Joe Girardi were to make Phil Hughes the team's primary eighth-inning option."Hughes is throwing extremely well," Bruney told The Post before the Yankees defeated Seattle, 4-2, at the Stadium. "But the rest of our bullpen is [also]...