golang: Stop using io/ioutils

The package has been deprecated as part of 1.16 and the same
functionality is now provided by either the io or the os package.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

src/tools/log-parser/hexbytes.go

@@ -9,7 +9,6 @@ package main
 import (
 	"errors"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 )
@@ -56,7 +55,7 @@ func (r *HexByteReader) Read(p []byte) (n int, err error) {
 		}
 
 		// read the entire file
-		bytes, err := ioutil.ReadAll(r.f)
+		bytes, err := io.ReadAll(r.f)
 		if err != nil {
 			return 0, err
 		}