code: @PostMapping("/deletesingletag")
    public @ResponseBody void deleteSingleTag(@Valid @RequestBody RemoveTagRequest request) {
      ontologyTagService.removeAttributeTag(
          request.getEntityTypeId(),
          request.getAttributeName(),
          request.getRelationIRI(),
          request.getOntologyTermIRI());
    }
docs: Delete a single tag
  
  @param request the {@link RemoveTagRequest} containing entityTypeId, attributeName, relationIRI
  and ontologyTermIRI