platform asdev, revert mqtt client changes, uart-isr to flash to save ram

lib/espMqttClient/src/Transport/ClientSecureSync.h

@@ -11,11 +11,7 @@ the LICENSE file.
 #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
 
 #include "../Config.h"
-#if defined(EMC_CLIENT_SECURE)
 #include <WiFiClientSecure.h>  // includes IPAddress
-#else
-#include <WiFiClient.h>
-#endif
 
 #include "Transport.h"
 
@@ -31,11 +27,7 @@ class ClientSecureSync : public Transport {
   void stop() override;
   bool connected() override;
   bool disconnected() override;
-#if defined(EMC_CLIENT_SECURE)
   WiFiClientSecure client;
-#else
-  WiFiClient client;
-#endif
 };
 
 }  // namespace espMqttClientInternals