Remove outdated, pre-installed shellcheck

Author: SuperSandro2000

internal/ghworkflow/workflow_checks.go

@@ -28,6 +28,10 @@ func checksWorkflow(cfg core.Configuration) {
 	})
 
 	if cfg.ShellCheck.Enabled.UnwrapOr(true) {
+		j.addStep(jobStep{
+			Name: "Delete pre-installed shellcheck",
+			Run:  "sudo rm -f $(which shellcheck)",
+		})
 		j.addStep(jobStep{
 			Name: "Run shellcheck",
 			Run:  "make run-shellcheck",