Drop deprecated ioutil

`ioutil` has been deprecated by golang. All the code in `ioutil` just
forwards functionality to code in either the `io` or `os` packages.

See https://github.com/golang/go/pull/51961 for more info.

Signed-off-by: Jeff Widman <jeff@jeffwidman.com>

remotes/docker/config/docker_fuzzer_internal.go

@@ -20,7 +20,6 @@
 package config
 
 import (
-	"io/ioutil"
 	"os"
 
 	fuzz "github.com/AdaLogics/go-fuzz-headers"
@@ -28,7 +27,7 @@ import (
 
 func FuzzParseHostsFile(data []byte) int {
 	f := fuzz.NewConsumer(data)
-	dir, err := ioutil.TempDir("", "fuzz-")
+	dir, err := os.MkdirTemp("", "fuzz-")
 	if err != nil {
 		return 0
 	}