Deleting an index does not seem to delete external versioning

Ok yes deleting an externally-versioned document from an index that does not exist will actually create the index in order to record the deletion:

GET /_cat/indices

# 200 OK

DELETE /i/_doc/someid?version=0&version_type=external

# 404 Not Found
# {
#   "_type": "_doc",
#   "_primary_term": 1,
#   "_id": "someid",
#   "_shards": {
#     "successful": 1,
#     "total": 2,
#     "failed": 0
#   },
#   "_index": "i",
#   "result": "not_found",
#   "_version": 0,
#   "_seq_no": 0
# }

GET /_cat/indices

# 200 OK
# yellow open i Pqo2tMyMRyOTOXvFAUk0Tw 5 1 0 0 1.1kb 1.1kb
#