chore: remove refs to deprecated io/ioutil (#2717)

Signed-off-by: guoguangwu <guoguangwu@magic-shield.com>

main/commands/helpers/fs.go

@@ -2,7 +2,6 @@ package helpers
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -10,7 +9,7 @@ import (
 
 // ReadDir finds files according to extensions in the dir
 func ReadDir(dir string, extensions []string) ([]string, error) {
-	confs, err := ioutil.ReadDir(dir)
+	confs, err := os.ReadDir(dir)
 	if err != nil {
 		return nil, err
 	}

main/commands/run.go

@@ -2,7 +2,6 @@ package commands
 
 import (
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -113,7 +112,7 @@ func dirExists(file string) bool {
 }
 
 func readConfDir(dirPath string, extension []string) cmdarg.Arg {
-	confs, err := ioutil.ReadDir(dirPath)
+	confs, err := os.ReadDir(dirPath)
 	if err != nil {
 		base.Fatalf("failed to read dir %s: %s", dirPath, err)
 	}