Establish MQTT connection only from MQTT::runOnce (#6057)

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/eth/ethClient.cpp

@@ -5,9 +5,6 @@
 #include "configuration.h"
 #include "main.h"
 #include "mesh/api/ethServerAPI.h"
-#if !MESHTASTIC_EXCLUDE_MQTT
-#include "mqtt/MQTT.h"
-#endif
 #include "target_specific.h"
 #include <RAK13800_W5100S.h>
 #include <SPI.h>
@@ -72,12 +69,6 @@ static int32_t reconnectETH()
 
             ethStartupComplete = true;
         }
-#if !MESHTASTIC_EXCLUDE_MQTT
-        // FIXME this is kinda yucky, instead we should just have an observable for 'wifireconnected'
-        if (mqtt && !moduleConfig.mqtt.proxy_to_client_enabled && !mqtt->isConnectedDirectly()) {
-            mqtt->reconnect();
-        }
-#endif
     }
 
 #ifndef DISABLE_NTP