clean up unused code

Programme/AVR/Loopback_single_AVR/avr_code/avr_code.ino

Programme/AVR/Loopback_single_AVR/avr_code/pinchange.ino

Programme/AVR/Loopback_single_AVR/avr_code/timer_1.ino

Programme/AVR/Timer_test_precision/avr_code/avr_code.ino

Programme/AVR/Timer_test_precision/avr_code/pinchange.h

Programme/AVR/Timer_test_precision/avr_code/pinchange.ino

Programme/AVR/Timer_test_precision/avr_code/timer_1.h

Programme/AVR/Timer_test_precision/avr_code/timer_1.ino

.../AVR/old/Loopback_multi_AVR/replyer/avr_code/avr_code.ino

...e/AVR/old/Loopback_multi_AVR/replyer/avr_code/pinchange.h

...AVR/old/Loopback_multi_AVR/replyer/avr_code/pinchange.ino

...mme/AVR/old/Loopback_multi_AVR/replyer/avr_code/timer_1.h

...e/AVR/old/Loopback_multi_AVR/replyer/avr_code/timer_1.ino

.../Loopback_multi_AVR/sender_measurer/avr_code/avr_code.ino

...d/Loopback_multi_AVR/sender_measurer/avr_code/pinchange.h

...Loopback_multi_AVR/sender_measurer/avr_code/pinchange.ino

...old/Loopback_multi_AVR/sender_measurer/avr_code/timer_1.h

...d/Loopback_multi_AVR/sender_measurer/avr_code/timer_1.ino

Programme/CAN/errors/minimal_size/sender.can

Programme/CAN/throughput/bidir_allsize/old/measurements.ods