chore: remove refs to deprecated io/ioutil

pkg/util/metrics/helpers_test.go

@@ -16,7 +16,7 @@ limitations under the License.
 package metrics
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 )
 
@@ -121,7 +121,7 @@ func TestPrometheusMetricsParsingAndMatching(t *testing.T) {
 
 	for _, test := range testCases {
 		t.Run(test.name, func(t *testing.T) {
-			b, err := ioutil.ReadFile(test.metricsTextPath)
+			b, err := os.ReadFile(test.metricsTextPath)
 			if err != nil {
 				t.Errorf("Unexpected error reading file %s: %v", test.metricsTextPath, err)
 			}

pkg/util/nethealth/nethealth.go

@@ -28,7 +28,7 @@ import (
 	"crypto/sha512"
 	"encoding/hex"
 	"flag"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"strings"
@@ -92,7 +92,7 @@ func main() {
 	if res.ContentLength != objectLength {
 		log.Fatalf("Length reported (%d) is not equal to expected length (%d)", res.ContentLength, objectLength)
 	}
-	blobData, err := ioutil.ReadAll(res.Body)
+	blobData, err := io.ReadAll(res.Body)
 	res.Body.Close()
 	if err != nil {
 		log.Fatal("Failed to read full content", err)
@@ -110,7 +110,7 @@ func main() {
 	if err != nil {
 		log.Fatalf("Failure (%s) while reading %s", err, objectHashUrl)
 	}
-	content, err := ioutil.ReadAll(res.Body)
+	content, err := io.ReadAll(res.Body)
 	res.Body.Close()
 	if err != nil {
 		log.Fatal("Failed to read full content of hash file", err)