By Alek Arend The Pittsburgh Steelers appear to be moving on from linebacker Devin Bush. On Monday, the AFC North franchise decided it will not be picking up his fifth-year option. That means 2022 will probably be his final season in Pittsburgh. Bush started 34 and appeared in 35 games for the Steelers over the last three seasons. He had 205 total tackles, four sacks and five fumble recoveries during that span. The former Michigan star will become a free agent next offseason. “#Steelers not showing faith in Devin Bush. This might be a mistake. If Bush balls out with Myles Jack beside him & a f…