internal/rosa: remove unused helpers

These are no longer needed after migration.

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

internal/rosa/perl.go

@@ -1,14 +1,8 @@
 package rosa
 
-import (
-	"slices"
-
-	"hakurei.app/internal/pkg"
-)
-
 var _perl = H("perl")
 
-// MakeMakerHelper is the [Perl] MakeMaker helper.
+// MakeMakerHelper builds projects using the included MakeMaker script.
 type MakeMakerHelper struct {
 	// Whether to skip the check target.
 	SkipCheck bool
@@ -49,17 +43,3 @@ make \
 	script += "make DESTDIR=/work install\n"
 	return script
 }
-
-// newViaPerlMakeMaker installs a perl module via Makefile.PL.
-func (t Toolchain) newViaPerlMakeMaker(
-	name, version string,
-	source pkg.Artifact,
-	patches []KV,
-	extra ...ArtifactH,
-) pkg.Artifact {
-	return t.NewPackage("perl-"+name, version, source, &PackageAttr{
-		Patches: patches,
-	}, (*MakeMakerHelper)(nil), slices.Concat(extra, P{
-		_perl,
-	})...)
-}