Remove underscore logic

[SFJohnson24]

There is remaining underscore logic for rules left over from editor.

cdisc-rules-engine/cdisc_rules_engine/models/rule.py

Line 85 in 46ef2f2

def spaces_to_underscores(cls, obj):

This is not needed and it would be good to transition out of it--the parsing logic as well as the references to paramaters with underscores in their names will need to be phased out.

this ticket spurred this one: https://github.com/cdisc-org/cdisc-library-api/issues/16