internal/rosa: remove global handles

These no longer serve any purpose.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/rosa.go

@@ -231,6 +231,10 @@ var (
 
 	// The Mksh shell is added by [Toolchain.New] and used by almost all packages.
 	Mksh = H("mksh")
+	// Toybox is standard utilities added by [Toolchain.New].
+	Toybox = H("toybox")
+	// LLVM is the standard toolchain added by [Toolchain.New].
+	LLVM = H("llvm")
 )
 
 // New returns a [pkg.Artifact] based on a [Toolchain] via s.
@@ -298,7 +302,7 @@ mkdir -vp /work/system/bin
 
 		base := LLVM
 		if flag&TNoToolchain != 0 {
-			base = Musl
+			base = musl
 		}
 
 		support = slices.Concat(extra, t.S.New(t.stage-1).Append([]pkg.Artifact{
@@ -335,6 +339,9 @@ mkdir -vp /work/system/bin
 	)
 }
 
+// patch is used by [Toolchain.NewPatchedSource].
+var patch = H("patch")
+
 // NewPatchedSource returns [pkg.Artifact] of source with patches applied. If
 // passthrough is true, source is returned as is for zero length patches.
 func (t Toolchain) NewPatchedSource(
@@ -371,7 +378,7 @@ cat /usr/src/` + name + `-patches/* | \
 		aname += "-patched"
 	}
 	return t.New(aname, 0, t.Append(nil,
-		Patch,
+		patch,
 	), nil, nil, script, paths...)
 }