Remove the certificate management methods from dart:io

sdk/lib/_internal/lib/io_patch.dart

Index: sdk/lib/_internal/lib/io_patch.dart
diff --git a/sdk/lib/_internal/lib/io_patch.dart b/sdk/lib/_internal/lib/io_patch.dart
index 6aed3a2c6c5eec8d9413efed4346b0acb91153f7..e41a2ce63e58d11cfe4b6f7ddf0bf3f1b4bbe629 100644
--- a/sdk/lib/_internal/lib/io_patch.dart
+++ b/sdk/lib/_internal/lib/io_patch.dart
@@ -289,33 +289,9 @@ patch class SecureSocket {
 
   patch static void initialize({String database,
                                 String password,
-                                bool useBuiltinRoots: true,
-                                bool readOnly: true}) {
+                                bool useBuiltinRoots: true}) {
     throw new UnsupportedError("SecureSocket.initialize");
   }
-
-  patch static X509Certificate addCertificate(List<int> certificate,
-                                              String trust) {
-    throw new UnsupportedError("SecureSocket.addCertificate");
-  }
-
-  patch static importCertificatesWithPrivateKeys(List<int> certificates,
-                                                 String password) {
-    throw new UnsupportedError(
-        "SecureSocket.importCertificatesWithPrivateKeys");
-  }
-
-  patch static X509Certificate getCertificate(String nickname) {
-    throw new UnsupportedError("SecureSocket.getCertificate");
-  }
-
-  patch static removeCertificate(String nickname) {
-    throw new UnsupportedError("SecureSocket.removeCertificate");
-  }
-
-  patch static X509Certificate changeTrust(String nickname, String trust) {
-    throw new UnsupportedError("SecureSocket.changeTrust");
-  }
 }
 
 patch class _SecureFilter {