unused variable 'ret' [-Wunused-variable]

   int ret;

Author: dvarrel

src/SigFox.cpp

@@ -213,7 +213,6 @@ int SIGFOXClass::send(unsigned char mess[], int len, bool rx)
 }
 
 int SIGFOXClass::sendBit(bool value){
-  int ret;
   int i = 0;
   status();