Taylor Swift’s three performances in Vienna have been cancelled, organizers said late Wednesday, after two suspects were arrested for allegedly plotting terrorist attacks. The decision to scrap the shows set for Thursday, Friday and Saturday of this week was announced by Barracuda Music in a message on Instagram. It came hours after Austrian law enforcement announced that two individuals had been taken into custody on suspicion they were planning attacks, including on Swift’s shows. Franz Ruf, director general for public security at the Austrian Interior Ministry, said chemical substances were…