Revert "Add jon, JSON parser for the fishshell."
Revert "Add jon, JSON parser for the fishshell."

This reverts commit 875fa421634352f93a288af640a185dee4cec67e.

epoberezkin/JSON-Schema-Test-Suite,atomiqio/json-schema-test-suite,atomiqio/json-schema-test-suite,WHenderson/ex-json-schema,neomadara/JSON-Schema-Test-Suite,json-schema/JSON-Schema-Test-Suite,Relequestual/JSON-Schema-Test-Suite,moander/JSON-Schema-Test-Suite,WHenderson/ex-json-schema,epoberezkin/JSON-Schema-Test-Suite,json-schema-org/JSON-Schema-Test-Suite