Update COM_SigFox.ino

Author: Tinyu-Zhao

examples/Modules/COM_SigFox/COM_SigFox.ino

@@ -20,9 +20,6 @@ void setup() {
 
   M5.begin();
   Serial2.begin(9600, SERIAL_8N1, rxPin, txPin);
-
-
-  Serial.begin(115200);
 
   delay(2000);
   getID();