By Andrew Gould Bennedict Mathurin dazzled during his brief NBA Summer League stint, but he’ll no longer compete in Las Vegas. The Indiana Pacers announced Thursday that they’re shutting down this year’s No. 6 pick “for precautionary reasons due to a sore left big toe.” Isaiah Jackson and Terry Taylor also won’t play in any more Summer League matchups. Mathurin made a strong first impression by registering 23 points in his Summer League debut. He scored 20 more in Tuesday night’s win over the Detroit Pistons. With their highest draft pick since 1988, the Pacers selected Mathurin out of Arizona…