Merge pull request #1046 from arduino/pennam-patch-unused

STM32H747_System: remove unused variable

Author: pennam

libraries/STM32H747_System/src/STM32H747_System.cpp

@@ -6,7 +6,6 @@
 extern RTC_HandleTypeDef RTCHandle;
 
 uint8_t STM32H747::readReg(uint8_t subAddress) {
-  char response = 0xFF;
   Wire1.beginTransmission(PMIC_ADDRESS);
   Wire1.write(subAddress);
   Wire1.endTransmission(false);
@@ -115,4 +114,4 @@ bool STM32H747::useInternalOscillator(bool lowspeed) {
   digitalWrite(PH_1, LOW);
 
   return true;
-}
+}