Kill getConflictTaxJsonAltRel, getJSONFromNode_url

These are no longer used, but had references in configuration and code
that might lead to confusion. Related to
https://github.com/OpenTreeOfLife/taxomachine/commit/1c5e1fa216a87302959efecc9b8b7f8fc4acc33b
Merge pull request #433 from OpenTreeOfLife/remove-unused-taxomachine-services

Kill getConflictTaxJsonAltRel, getJSONFromNode_url