this was already confusing in [evolven3fit](https://github.com/NNPDF/nnpdf/blob/17b53d34f1eb6c3ed067e1475742517802b5ddd4/n3fit/src/evolven3fit/eko_utils.py#L16) and it is also confusing for others (cc @mcerutti996) - let's not use it (i.e. hard-code it to 1)
this was already confusing in evolven3fit and it is also confusing for others (cc @mcerutti996) - let's not use it (i.e. hard-code it to 1)