Weights provided by the user not supported

[hariszaf]

@danielriosgarza
As gapfill_class now implemented does not support for the user to provided his/her own weights, is that right?

Imho, that is perfectly fine; this is just to make sure of that so we remove that permanently from the test file.

DNNGIOR/scripts/test.py

Line 68 in 605c9b6

# # Add costs to reactions