Remove redundant cvrf_enumeration_node_value function
Remove redundant cvrf_enumeration_node_value function

The cvrf_enumeration_node_value function was intended to be a helper
function for parsing enums from XML element contents (rather than
from attributes). It was only used by one other function, so this
was reworked to be more efficient

redhatrises/openscap,jan-cerny/openscap,redhatrises/openscap,redhatrises/openscap,mpreisler/openscap,mpreisler/openscap,jan-cerny/openscap,OpenSCAP/openscap,redhatrises/openscap,OpenSCAP/openscap,mpreisler/openscap,OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,mpreisler/openscap,jan-cerny/openscap,OpenSCAP/openscap,mpreisler/openscap,redhatrises/openscap,redhatrises/openscap,jan-cerny/openscap,jan-cerny/openscap,jan-cerny/openscap,mpreisler/openscap