d3173f4ab6
The -d(ebug) option broke 5 years ago when I migrated the driver to libOption. Since then, we were never check if the option is set. We were incorrectly toggling the internal variable (m_debug_mode) based on OPT_no_use_colors instead. Given that the functionality doesn't seem particularly useful and nobody noticed it has been broken for 5 years, I'm just removing the flag.