[GithubIssueBridge] Don't return error messages in detectParameters()
[GithubIssueBridge] Don't return error messages in detectParameters()

detectParameters() is called in a loop for all bridges on a URL, thus
if a bridge returns an error message, the output messages get mixed
up and all detect operations fail.

This seems to be a limitation of the detect function for now.

kranack/rss-bridge,Frenzie/rss-bridge,Frenzie/rss-bridge,kranack/rss-bridge,ORelio/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,Riduidel/rss-bridge,RSS-Bridge/rss-bridge,ORelio/rss-bridge,Riduidel/rss-bridge,kranack/rss-bridge,sebsauvage/rss-bridge,RSS-Bridge/rss-bridge,Riduidel/rss-bridge,RSS-Bridge/rss-bridge