Removes key from json object within postgres

json_object_delete_keys.sql

CREATE OR REPLACE FUNCTION "json_object_delete_keys"("json" json, VARIADIC "keys_to_delete" TEXT[])
  RETURNS json
  LANGUAGE sql
  IMMUTABLE
  STRICT
AS $function$
SELECT COALESCE(
  (SELECT ('{' || string_agg(to_json("key") || ':' || "value", ',') || '}')
   FROM json_each("json")
   WHERE "key" <> ALL ("keys_to_delete")),
  '{}'
)::json
$function$;