Barcelona will not sell the Premier League-linked Ronald Araujo this summer as letting go of the reported Manchester United would be a ‘mistake’. That is the assessment of Deco, a Blaugrana hero in his playing days now attempting to build on his Camp Nou legacy in his current role as the club’s sporting director. Sky Germany reported that Manchester United, amongst a whole host of rival top-flight clubs, have informed Barcelona that they would love to take the highly-rated Ronald Araujo off their hands if the Uruguayan becomes available for transfer at a club still battling with serious financ…