Chelsea striker Sam Kerr is to leave the club after six successful years in west London. The Australian won five Women’s Super League titles, three FA Cups and three League Cups during her time with the Blues, as well as two WSL Golden Boots. Kerr also had a knack of scoring at important moments for Chelsea , including in three FA Cup finals at Wembley and to win the WSL on the final day of the season. With 115 goals in 177 appearances, Kerr is the second-highest goalscorer in Chelsea’s history, trailing Fran Kirby by one. She could equal that record in her final appearance against Manchester United on Saturday. “When I reflect on my Chelsea career and doing it for the last time, I just feel happy,” Kerr, 32, said.…