Stop passing in loggers to clusters explicitly (#21999)

command/approle_concurrency_integ_test.go

@@ -8,7 +8,6 @@ import (
 	"sync"
 	"testing"
 
-	log "github.com/hashicorp/go-hclog"
 	"github.com/hashicorp/vault/api"
 	auth "github.com/hashicorp/vault/api/auth/approle"
 	credAppRole "github.com/hashicorp/vault/builtin/credential/approle"
@@ -20,9 +19,6 @@ import (
 func TestAppRole_Integ_ConcurrentLogins(t *testing.T) {
 	var err error
 	coreConfig := &vault.CoreConfig{
-		DisableMlock: true,
-		DisableCache: true,
-		Logger:       log.NewNullLogger(),
 		CredentialBackends: map[string]logical.Factory{
 			"approle": credAppRole.Factory,
 		},