cubicweb-tracker #3005554 remove bogus error-handling adapter [rejected]

since .project will choke on error we typically get a nasty IndexError ... instead of a nicely formated msg

just let cubicweb do its thing

prioritynormal
typebug
done in1.15.0
load0.000
load left0.000
closed by<not specified>
patch[entities/version] remove bogus error handling adapter (for version unicity) [rejected]