refactor: remove use of tmos "github.com/tendermint/tendermint/libs/os" (#13113)

simapp/simd/cmd/testnet.go

@@ -13,7 +13,6 @@ import (
 	"cosmossdk.io/math"
 	"github.com/spf13/cobra"
 	tmconfig "github.com/tendermint/tendermint/config"
-	tmos "github.com/tendermint/tendermint/libs/os"
 	tmrand "github.com/tendermint/tendermint/libs/rand"
 	"github.com/tendermint/tendermint/types"
 	tmtime "github.com/tendermint/tendermint/types/time"
@@ -469,13 +468,11 @@ func calculateIP(ip string, i int) (string, error) {
 func writeFile(name string, dir string, contents []byte) error {
 	file := filepath.Join(dir, name)
 
-	err := tmos.EnsureDir(dir, 0o755)
-	if err != nil {
-		return err
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return fmt.Errorf("could not create directory %q: %w", dir, err)
 	}
 
-	err = os.WriteFile(file, contents, 0o644) //nolint: gosec
-	if err != nil {
+	if err := os.WriteFile(file, contents, 0o644); err != nil { //nolint: gosec
 		return err
 	}