cli/command/idresolver: 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>

cli/command/idresolver/idresolver_test.go

@@ -2,11 +2,11 @@ package idresolver
 
 import (
 	"context"
+	"errors"
 	"testing"
 
 	"github.com/docker/cli/internal/test/builders"
 	"github.com/docker/docker/api/types/swarm"
-	"github.com/pkg/errors"
 	"gotest.tools/v3/assert"
 	is "gotest.tools/v3/assert/cmp"
 )
@@ -14,7 +14,7 @@ import (
 func TestResolveError(t *testing.T) {
 	cli := &fakeClient{
 		nodeInspectFunc: func(nodeID string) (swarm.Node, []byte, error) {
-			return swarm.Node{}, []byte{}, errors.Errorf("error inspecting node")
+			return swarm.Node{}, []byte{}, errors.New("error inspecting node")
 		},
 	}
 
@@ -75,7 +75,7 @@ func TestResolveNode(t *testing.T) {
 		{
 			nodeID: "nodeID",
 			nodeInspectFunc: func(string) (swarm.Node, []byte, error) {
-				return swarm.Node{}, []byte{}, errors.Errorf("error inspecting node")
+				return swarm.Node{}, []byte{}, errors.New("error inspecting node")
 			},
 			expectedID: "nodeID",
 		},
@@ -117,7 +117,7 @@ func TestResolveService(t *testing.T) {
 		{
 			serviceID: "serviceID",
 			serviceInspectFunc: func(string) (swarm.Service, []byte, error) {
-				return swarm.Service{}, []byte{}, errors.Errorf("error inspecting service")
+				return swarm.Service{}, []byte{}, errors.New("error inspecting service")
 			},
 			expectedID: "serviceID",
 		},