cli/command: remove uses of pkg/errors in tests

While there may be reasons to keep pkg/errors in production code,
we don't need them for these tests.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

cli/command/cli_test.go

@@ -3,6 +3,7 @@ package command
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -22,7 +23,6 @@ import (
 	"github.com/docker/docker/api"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/client"
-	"github.com/pkg/errors"
 	"gotest.tools/v3/assert"
 	"gotest.tools/v3/fs"
 )

cli/command/utils_test.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -17,7 +18,6 @@ import (
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/streams"
 	"github.com/docker/cli/internal/test"
-	"github.com/pkg/errors"
 	"gotest.tools/v3/assert"
 )