Remove warning

src/main.cpp

@@ -376,6 +376,10 @@ void goToSleep(int sleepInterval) {
 
 void loop() {
   switch (runMode) {
+    case RunMode::storageMode:
+        // This point is never reached, just here to remove warning.
+      break;
+
     case RunMode::configurationMode:
       if (myWifi.isConnected()) myWebServerHandler.loop();