internal/testutils/networking: rm uses of lazyregexp

It's not needed for test-utilities.

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

internal/testutils/networking/firewall.go

@@ -3,10 +3,10 @@ package networking
 import (
 	"fmt"
 	"os/exec"
+	"regexp"
 	"strings"
 	"testing"
 
-	"github.com/docker/docker/internal/lazyregexp"
 	"github.com/docker/docker/testutil/daemon"
 	"gotest.tools/v3/assert"
 	"gotest.tools/v3/icmd"
@@ -21,7 +21,7 @@ const (
 )
 
 // Find the policy in, for example "Chain FORWARD (policy ACCEPT)".
-var rePolicy = lazyregexp.New("policy ([A-Za-z]+)")
+var rePolicy = regexp.MustCompile("policy ([A-Za-z]+)")
 
 // SetFilterForwardPolicies sets the default policy for the FORWARD chain in
 // the filter tables for both IPv4 and IPv6. The original policy is restored