LAS VEGAS — Manny Pacquiao could face disciplinary action from Nevada boxing officials for failing to disclose a shoulder injury before his fight with Floyd Mayweather Jr.Nevada Athletic Commission Chairman Francisco Aguilar said Monday that the state attorney general’s office will look at why Pacquiao checked “no” a day before the fight on a commission questionnaire asking if he had a shoulder injury.“We will gather all the facts and follow the circumstances,” Aguilar said. “At …