portainer/app/azure/rest/azure.js

angular.module('portainer.azure')
.factory('Azure', ['$http', 'API_ENDPOINT_ENDPOINTS', 'EndpointProvider',
function AzureFactory($http, API_ENDPOINT_ENDPOINTS, EndpointProvider) {
  'use strict';

  var service = {};

  service.delete = function(id, apiVersion) {
    var url = API_ENDPOINT_ENDPOINTS + '/' + EndpointProvider.endpointID() + '/azure' + id + '?api-version=' + apiVersion;
    return $http({
      method: 'DELETE',
      url: url
    });
  };

  return service;
}]);