By Andrew Holleran The Pittsburgh Steelers might be offering a hint at which quarterbacks they’re truly interested in leading up to the NFL Draft. Mike Tomlin admitted on Sunday that he will not be in attendance for Sam Howell’s North Carolina pro day this week. While Tomlin is “pissed” about missing it, this could be a sign that other quarterbacks – Malik Willis, mainly – are higher on their draft board. Tomlin was in attendance at Willis’ pro day earlier this month. Steelers fans believe Howell can be crossed of the board. “Kind of an interesting note. Would make it solely on Colbert attendi…