doc: DELETE returns 204, API doc says 200
https://dev.textgridlab.org/doc/services/submodules/tg-crud/tgcrud-webapp/docs/index.html#delete says:
Response: 200 OK
but actually returned to clients is 204
https://dev.textgridlab.org/doc/services/submodules/tg-crud/tgcrud-webapp/docs/index.html#delete says:
Response: 200 OK
but actually returned to clients is 204