star Tyrone May has been sacked by Penrith Panthers over a provocative  Instagram picture he posted after last month’s Grand Final against South Sydney. A club board meeting on Wednesday morning took the decision to axe May, 25, immediately over the post, which has since been deleted after a furious backlash. The post appeared to claim the porn sneak had been vindicated despite pleading guilty to filming sex tapes without permission and narrowly dodging jail.  The pic showed May and…