Several unused variables and parameters on ATMega32U4 based boards (Leonardo, Yun)

[eddyp]

When compiling for Leonardo I get these warnings:

/home/eddy/opt/arduino-1.8.13/hardware/tools/avr/bin/avr-g++ -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega32u4 -DF_CPU=16000000L -DARDUINO=10813 -DARDUINO_AVR_LEONARDO -DARDUINO_ARCH_AVR -DUSB_VID=0x2341 -DUSB_PID=0x8036 "-DUSB_MANUFACTURER="Unknown"" "-DUSB_PRODUCT="Arduino Leonardo"" -I/home/eddy/opt/arduino-1.8.13/hardware/arduino/avr/cores/arduino -I/home/eddy/opt/arduino-1.8.13/hardware/arduino/avr/variants/leonardo -I/home/eddy/Arduino/libraries/Low-Power -I/home/eddy/Arduino/libraries/LiquidCrystal_PCF8574/src -I/home/eddy/opt/arduino-1.8.13/hardware/arduino/avr/libraries/Wire/src -I/home/eddy/Arduino/libraries/EEPROMWearLevel -I/home/eddy/opt/arduino-1.8.13/hardware/arduino/avr/libraries/EEPROM/src /home/eddy/Arduino/libraries/Low-Power/LowPower.cpp -o /tmp/arduino_build_8835/libraries/Low-Power/LowPower.cpp.o
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp: In member function 'void LowPowerClass::adcNoiseReduction(period_t, adc_t, timer2_t)':
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:664:16: warning: unused variable 'clockSource' [-Wunused-variable]
unsigned char clockSource = 0;
^~~~~~~~~~~
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:661:21: warning: unused parameter 'timer2' [-Wunused-parameter]
timer2_t timer2)
^~~~~~
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp: In member function 'void LowPowerClass::powerSave(period_t, adc_t, bod_t, timer2_t)':
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:808:16: warning: unused variable 'clockSource' [-Wunused-variable]
unsigned char clockSource = 0;
^~~~~~~~~~~
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:805:22: warning: unused parameter 'timer2' [-Wunused-parameter]
timer2_t timer2)
^~~~~~
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp: In member function 'void LowPowerClass::powerExtStandby(period_t, adc_t, bod_t, timer2_t)':
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:952:16: warning: unused variable 'clockSource' [-Wunused-variable]
unsigned char clockSource = 0;
^~~~~~~~~~~
/home/eddy/Arduino/libraries/Low-Power/LowPower.cpp:949:22: warning: unused parameter 'timer2' [-Wunused-parameter]
timer2_t timer2)
^~~~~~

As I like to keep 0-warnings projects, these are a problem. Also, if they timer2 parameters are used, are they properly supported?