By Simon Mullock At least Luton Town’s fans seem to believe that the 115 charges levelled against Manchester City won’t actually stick. There were 3,000 Hatters housed in the corner of the Etihad’s South Stand – and they appeared to be having a rare old time teasing the home supporters despite being forced to watch their team being slowly pulled apart by Pep Guardiola’s champions. “Conference champions, you’ll never sing that,” they chanted, choosing to forget that there are those who would have City playing local derbies against Oldham, Rochdale and Altrincham even before the Premier League c…