clean initialization

Author: fabik111

src/ArduinoIoTCloud.h

@@ -153,7 +153,7 @@ class ArduinoIoTCloudClass
 
     ConnectionHandler * _connection;
     #if NETWORK_CONFIGURATOR_ENABLED
-    NetworkConfiguratorClass * _configurator = nullptr;
+    NetworkConfiguratorClass * _configurator;
     #endif
     TimeServiceClass & _time_service;
     String _thing_id;