By Frank Dalleres The Premier League should be trimmed to just 18 teams in order to tackle the player workload row dividing the game, says former chief David Dein. Europe’s 20-team domestic leagues are coming under increasing pressure to slim down as clubs juggle additional European games and the imminent expanded Club World Cup. France’s Ligue 1 joined Germany’s Bundesliga on 18 teams last season and Dein, one of the architects of the Premier League, believes England should follow suit. “When we formed the Premier League, it was mandated to be an 18-club league. Immediately, with the stroke o…