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

testutil/network/util.go

@@ -2,11 +2,11 @@ package network
 
 import (
 	"encoding/json"
+	"fmt"
 	"os"
 	"path/filepath"
 	"time"
 
-	tmos "github.com/tendermint/tendermint/libs/os"
 	"github.com/tendermint/tendermint/node"
 	"github.com/tendermint/tendermint/p2p"
 	pvm "github.com/tendermint/tendermint/privval"
@@ -194,13 +194,11 @@ func initGenFiles(cfg Config, genAccounts []authtypes.GenesisAccount, genBalance
 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
 	}