When the config was empty the `check_update` field defaults to an empty
string which caused a boolean parsing error.

fix: do not result in bool parse error for empty config

See merge request !2467



Merged-by: Filip Aleksic <faleksic@gitlab.com>
Approved-by: Filip Aleksic <faleksic@gitlab.com>
Co-authored-by: Timo Furrer <tfurrer@gitlab.com>

chore(duo/3p): Remove support for claude and codex

See merge request !2474



Merged-by: Timo Furrer <tfurrer@gitlab.com>
Approved-by: Timo Furrer <tfurrer@gitlab.com>
Co-authored-by: Shekhar Patnaik <spatnaik@gitlab.com>