tsnet: reenable TestLoopbackSOCKS5 on Windows

This test was either fixed in the intermediate time or mis-flagged
during the #7876 triage, but is now passing.

Updates #7876

Signed-off-by: James Tucker <jftucker@gmail.com>

tsnet/tsnet_test.go

@@ -24,7 +24,6 @@ import (
 	"net/netip"
 	"os"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"sync"
 	"testing"
@@ -357,10 +356,6 @@ func TestLoopbackLocalAPI(t *testing.T) {
 }
 
 func TestLoopbackSOCKS5(t *testing.T) {
-	if runtime.GOOS == "windows" {
-		t.Skip("TODO(#7876): test regressed on windows while CI was broken")
-	}
-
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()