refactor: using maps.Clone to simplify the code

Signed-off-by: zhuhaicity <zhuhai@52it.net>

app/app.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"maps"
 	"os"
 	"path/filepath"
 	"sort"
@@ -1156,12 +1157,7 @@ func (app *WasmApp) RegisterNodeService(clientCtx client.Context, cfg config.Con
 //
 // NOTE: This is solely to be used for testing purposes.
 func GetMaccPerms() map[string][]string {
-	dupMaccPerms := make(map[string][]string)
-	for k, v := range maccPerms {
-		dupMaccPerms[k] = v
-	}
-
-	return dupMaccPerms
+	return maps.Clone(maccPerms)
 }
 
 // BlockedAddresses returns all the app's blocked account addresses.