remove default collection of username

Author: Rob Loranger

config/options.go

@@ -79,10 +79,6 @@ func Collection(c *cli.Context) string {
 if coll := c.String("b"); coll != "" {
 return coll
 }
-u, _ := LoadUser(c)
-if u != nil {
-return u.User.Username
-}
 return ""
 }