Source contains ESP32-specific log_ prints

[PaulZC]

I'm seeing four uncommented log_ prints in NmeaPacket::FromString. These will cause compilation errors on non-ESP32 platforms...

https://github.com/search?q=repo%3Asparkfun%2FSparkFun_LG290P_GNSS_Arduino_Library%20log_&type=code

Time for some festive commenting...?! ;-)

[nseidle]

Commented out so at least it will compile now.