Revert "Add new InternetAddress class with a static lookup function (including IPv6 results)."

tests/standalone/io/secure_socket_bad_certificate_test.dart

Index: tests/standalone/io/secure_socket_bad_certificate_test.dart
diff --git a/tests/standalone/io/secure_socket_bad_certificate_test.dart b/tests/standalone/io/secure_socket_bad_certificate_test.dart
index 85b1cd3c714262369ec0c73ec70ac973244c4654..658d5601326159c230d98fde3b5149af7a05d974 100644
--- a/tests/standalone/io/secure_socket_bad_certificate_test.dart
+++ b/tests/standalone/io/secure_socket_bad_certificate_test.dart
@@ -31,12 +31,12 @@ void main() {
 }
 
 Future testCertificateCallback({String host, bool acceptCertificate}) {
-  try {
-    var x = 7;
-    SecureSocket.connect(host, 443, onBadCertificate: x)
-        .catchError((e) {}, test: (e) => e is ArgumentError);
-  } on TypeError catch (e) {
-  }
+  Expect.throws(
+      () {
+        var x = 7;
+        SecureSocket.connect(host, 443, onBadCertificate: x);
+      },
+      (e) => e is ArgumentError || e is TypeError);
 
   bool badCertificateCallback(X509Certificate certificate) {
     Expect.isTrue(certificate.subject.contains("O=Google Inc"));