chore: fix linting issues exposed by fixing golangci-lint (#12895)

Co-authored-by: Marko <marbar3778@yahoo.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>

simapp/export.go

@@ -47,7 +47,8 @@ func (app *SimApp) ExportAppStateAndValidators(
 
 // prepare for fresh start at zero height
 // NOTE zero height genesis is a temporary feature which will be deprecated
-//      in favour of export at a block height
+//
+//	in favour of export at a block height
 func (app *SimApp) prepForZeroHeightGenesis(ctx sdk.Context, jailAllowedAddrs []string) {
 	applyAllowedAddrs := false
 

simapp/simd/cmd/testnet.go

@@ -6,7 +6,6 @@ import (
 	"bufio"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -476,7 +475,7 @@ func writeFile(name string, dir string, contents []byte) error {
 		return err
 	}
 
-	err = ioutil.WriteFile(file, contents, 0o644) // nolint: gosec
+	err = os.WriteFile(file, contents, 0o644) //nolint: gosec
 	if err != nil {
 		return err
 	}