Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

mcs/class/System/System.Net.Security/RemoteCertificateValidationCallback.cs

@@ -28,8 +28,6 @@
 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
-#if !MONO_FEATURE_NEW_TLS
-
 using System.Security.Cryptography.X509Certificates;
 
 namespace System.Net.Security 
@@ -40,4 +38,3 @@ namespace System.Net.Security
 		X509Chain chain,
 		SslPolicyErrors sslPolicyErrors);
 }
-#endif