Silence Initial Auto-reload boot message

[mikeysklar]

CircuitPython provides suitable options for the boot.py and code.py to reduce REPL messages going to attached displays. However, the initial Auto-reload note happens before those files are sourced.

Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.

Is this necessary? Can it be printed later not from main.c so that it can be turned off?

        serial_write_compressed(
            MP_ERROR_TEXT("Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.\n"));

Forum issue for reference.