Inquiry about reference of dropout of grad school
It is possible that Boise State hasn't kept a record of your attendance if it was so short. Request a transcript from them before you make any decisions. If they have no record then you need not mention it in future. But if there is a record then it might depend on what the record says. If there is a grade assigned (incomplete or whatever), then it might be necessary to state it somewhere, though I doubt that the CV is the correct place. If the incident was brief and inconsequential, then your mention of it should also be brief. 

If the time period represents a gap in your education/work life it might be more necessary to mention it. However, I doubt that anyone would hold a brief mistake made in the past against you in any way.