Thomas Müller refuses to completely write off Bayern Munich’s season and has urged an all-out effort on Tuesday in the Championships League at Arsenal after their domestic campaign turned from bad to worse. Bayern blew a two-goal lead as they were stunned 3-2 by promoted Heidenheim on Saturday for back-to-back Bundesliga defeats and a 16-point deficit on leaders Bayer Leverkusen who are expected to clinch a maiden title next weekend. Bayern now travel to Emirates Stadium for a first leg quarter-final, knowing that Europe is their only chance to avoid a first season since 2012 without any silve…