mesh-bootstrap: drop an unread parameter

A parameter nothing reads is a claim the function makes about what it needs, and
this one was wrong.

Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF

internal/bootstrap/apply.go

@@ -33,7 +33,7 @@ type Runner = apply.Runner
 // clearing the launcher's start counter. Those are facts about a running `mesh-host`, and this is
 // not one.
 func ApplyBundle(ctx context.Context, o Options, sys system.System, d *declaration.Declaration,
-	source string, run Runner, say func(string)) (apply.Report, error) {
+	run Runner, say func(string)) (apply.Report, error) {
 
 	// Refuse a shape this host cannot apply before anything is applied, exactly as `mesh-host`
 	// does: finding out half way through is the half-configured machine tier 0 exists to prevent.

internal/bootstrap/bootstrap.go

@@ -222,7 +222,7 @@ func Run(ctx context.Context, o Options, d Deps, say func(string)) (Result, erro
 
 	// ---- 4. apply -----------------------------------------------------------------------
 	say("apply — raising the substrate")
-	report, err := ApplyBundle(ctx, o, sys, rewritten.Declaration, o.Out, d.Run, say)
+	report, err := ApplyBundle(ctx, o, sys, rewritten.Declaration, d.Run, say)
 	result.Applied, result.Changed = len(report.Outcomes), report.Changed()
 	if err != nil {
 		return result, failed(StepApply, err)