Remove another unused config key.
Remove another unused config key.


Former-commit-id: c48980cef6c7afcc3c122a5857d51283951f9d64
eggpi/citationhunt,guilherme-pg/citationhunt,guilherme-pg/citationhunt,eggpi/citationhunt,eggpi/citationhunt,eggpi/citationhunt,guilherme-pg/citationhunt,guilherme-pg/citationhunt