build: replace "golang.org/x/exp/slices" with "slices" now go1.21 is required

backend/onedrive/metadata.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"slices"
 	"strings"
 	"time"
 
@@ -14,7 +15,6 @@ import (
 	"github.com/rclone/rclone/fs/fserrors"
 	"github.com/rclone/rclone/lib/dircache"
 	"github.com/rclone/rclone/lib/errcount"
-	"golang.org/x/exp/slices" // replace with slices after go1.21 is the minimum version
 )
 
 const (

backend/onedrive/onedrive_internal_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"slices"
 	"testing"
 	"time"
 
@@ -16,7 +17,6 @@ import (
 	"github.com/rclone/rclone/lib/random"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-	"golang.org/x/exp/slices" // replace with slices after go1.21 is the minimum version
 )
 
 // go test -timeout 30m -run ^TestIntegration/FsMkdir/FsPutFiles/Internal$ github.com/rclone/rclone/backend/onedrive -remote TestOneDrive:meta -v

cmd/bisync/listing.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"os"
 	"regexp"
+	"slices"
 	"sort"
 	"strconv"
 	"strings"
@@ -21,7 +22,6 @@ import (
 	"github.com/rclone/rclone/fs/filter"
 	"github.com/rclone/rclone/fs/hash"
 	"github.com/rclone/rclone/fs/operations"
-	"golang.org/x/exp/slices"
 )
 
 // ListingHeader defines first line of a listing

go.mod

@@ -79,7 +79,6 @@ require (
 	go.etcd.io/bbolt v1.3.10
 	goftp.io/server/v2 v2.0.1
 	golang.org/x/crypto v0.25.0
-	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56
 	golang.org/x/net v0.27.0
 	golang.org/x/oauth2 v0.21.0
 	golang.org/x/sync v0.8.0
@@ -205,6 +204,7 @@ require (
 	go.opentelemetry.io/otel v1.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
+	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
 	golang.org/x/mod v0.19.0 // indirect
 	golang.org/x/tools v0.23.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20240701130421-f6361c86f094 // indirect