Don McLean is saying “bye bye” to the NRA — for now, at least. The “American Pie” singer has canceled a scheduled gig at the NRA convention in Houston this weekend, days after 18-year-old Salvador Ramos shot and killed 19 students and two teachers at a Texas elementary school. “In light of the recent events in Texas, I have decided it would be disrespectful and hurtful for me to perform for the NRA at their convention in Houston this week,” he said in a statement to the Portland Press Herald Wednesday. “I’m sure all the folks planning to attend this event are shocked and sickened by these even…