Remove useless dependency on HTTPClient

Author: facchinm

src/ArduinoCloudV2.h

@@ -4,7 +4,6 @@
 #include <MQTTClient.h>
 #include <ArduinoBearSSL.h>
 #include <ArduinoCloudThing.h>
-#include <ArduinoHttpClient.h>
 
 #include "CloudSerial.h"
 
@@ -52,7 +51,6 @@ class ArduinoCloudClass {
   String _id;
   ArduinoCloudThing Thing;
   BearSSLClient* _bearSslClient;
-  HttpClient* _otaClient;
   MQTTClient _mqttClient;
 
   String _stdinTopic;