Remove deprecated Autopilot references (#731)

Author: alejandroortizmartin

test/Twilio.Test/TwiML/AutopilotTest.cs

@@ -58,8 +58,6 @@ public void TestElementWithChildren()
 
             elem.Room("name", "participant_identity");
 
-            elem.Autopilot("name");
-
             elem.Stream(
                 "name",
                 "connector_name",
@@ -98,7 +96,6 @@ public void TestElementWithChildren()
                 "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + Environment.NewLine +
                 "<Connect>" + Environment.NewLine +
                 "  <Room participantIdentity=\"participant_identity\">name</Room>" + Environment.NewLine +
-                "  <Autopilot>name</Autopilot>" + Environment.NewLine +
                 "  <Stream name=\"name\" connectorName=\"connector_name\" url=\"url\" track=\"inbound_track\" statusCallback=\"status_callback\" statusCallbackMethod=\"GET\"></Stream>" + Environment.NewLine +
                 "  <VirtualAgent connectorName=\"connector_name\" language=\"language\" sentimentAnalysis=\"true\" statusCallback=\"status_callback\" statusCallbackMethod=\"GET\"></VirtualAgent>" + Environment.NewLine +
                 "  <Conversation serviceInstanceSid=\"service_instance_sid\" inboundAutocreation=\"true\" routingAssignmentTimeout=\"1\" inboundTimeout=\"1\" url=\"https://example.com\" method=\"GET\" record=\"do-not-record\" trim=\"trim-silence\" recordingStatusCallback=\"https://example.com\" recordingStatusCallbackMethod=\"GET\" recordingStatusCallbackEvent=\"in-progress\" statusCallback=\"https://example.com\" statusCallbackMethod=\"GET\" statusCallbackEvent=\"call-initiated\"></Conversation>" + Environment.NewLine +