update espMqttClient

networkDevices/ClientSyncW5500.cpp

@@ -54,10 +54,6 @@ namespace espMqttClientInternals {
         return client.write(buf, size);
     }
 
-    int ClientSyncW5500::available() {
-        return client.available();
-    }
-
     int ClientSyncW5500::read(uint8_t* buf, size_t size) {
         return client.read(buf, size);
     }

networkDevices/ClientSyncW5500.h

@@ -13,7 +13,6 @@ namespace espMqttClientInternals {
         bool connect(IPAddress ip, uint16_t port) override;
         bool connect(const char* host, uint16_t port) override;
         size_t write(const uint8_t* buf, size_t size) override;
-        int available() override;
         int read(uint8_t* buf, size_t size) override;
         void stop() override;
         bool connected() override;