Remove unused parser resource plumbing

internal/cobra/performance_test.go

@@ -1,9 +1,7 @@
 package cobra
 
 import (
-	"context"
 	"fmt"
-	"io"
 	"testing"
 )
 
@@ -11,7 +9,7 @@ func BenchmarkPerformanceParse(b *testing.B) {
 	wide := performanceFlatTree(128)
 	wideArgs := []string{"wide127"}
 	deep, deepArgs := performanceNestedTree(24)
-	options := ParseOptions{Context: context.Background(), Out: io.Discard, Err: io.Discard}
+	options := ParseOptions{}
 
 	for _, benchmark := range []struct {
 		name string
@@ -41,7 +39,7 @@ func BenchmarkPerformanceParse(b *testing.B) {
 func BenchmarkPerformanceSessionParseAndHelp(b *testing.B) {
 	root := performanceFlatTree(8)
 	args := []string{"wide007"}
-	session := Prepare(root, ParseOptions{Context: context.Background(), Out: io.Discard, Err: io.Discard})
+	session := Prepare(root, ParseOptions{})
 	result := session.Parse(args)
 	if result.Failure != nil {
 		b.Fatalf("fixture parse failed: %s", result.Failure.Message)