BOSTON – The Celtics and Kemba Walker are heading to a divorce. The Celtics looked to trade the high-priced point guard last summer, which did not sit well with Walker. Walker no longer feels wanted in Boston after Danny Ainge tried to trade him last offseason, reportedly in an effort to clear cap space for a Jrue Holiday trade. Walker played in just three of Boston’s games during the team’s first-round matchup with the Brooklyn Nets, averaging just 12.7 points off 32 percent shooting, and missed the final two games of the series with a bone bruise in his left knee.