code: function omit (obj, props) {
    props = Array.prototype.slice.call(arguments, 1);
    var keys = Object.keys(obj);
    var newObj = {};
  
    for (var i = 0; i < keys.length; i++) {
      var key = keys[i];
  
      if (props.indexOf(key) === -1) {
        newObj[key] = obj[key];
      }
    }
  
    return newObj;
  }
docs: Returns an object containing all properties of the given object,
  except for the specified properties to be omitted.
  
  @param {object} obj
  @param {...string} props
  @returns {object}