io/fs: use slices.Contains

Change-Id: Ifd91722fd63af89af96a90dd69c73488f7fab5d3
GitHub-Last-Rev: da03963a07
GitHub-Pull-Request: golang/go#67179
Reviewed-on: https://go-review.googlesource.com/c/go/+/583296
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

src/io/fs/glob_test.go

@@ -8,6 +8,7 @@ import (
 	. "io/fs"
 	"os"
 	"path"
+	"slices"
 	"strings"
 	"testing"
 )
@@ -30,7 +31,7 @@ func TestGlob(t *testing.T) {
 			t.Errorf("Glob error for %q: %s", tt.pattern, err)
 			continue
 		}
-		if !contains(matches, tt.result) {
+		if !slices.Contains(matches, tt.result) {
 			t.Errorf("Glob(%#q) = %#v want %v", tt.pattern, matches, tt.result)
 		}
 	}
@@ -65,16 +66,6 @@ func TestCVE202230630(t *testing.T) {
 	}
 }
 
-// contains reports whether vector contains the string s.
-func contains(vector []string, s string) bool {
-	for _, elem := range vector {
-		if elem == s {
-			return true
-		}
-	}
-	return false
-}
-
 type globOnly struct{ GlobFS }
 
 func (globOnly) Open(name string) (File, error) { return nil, ErrNotExist }