There is no reference to any use of [fiveArgumentPooler](https://github.com/facebook/react/blob/32f5b034ed229d048f76ae74e18d270edc801dbf/src/shared/utils/PooledClass.js#L68) in the codebase. Deleted it without issue. Sending a Pull Request
var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2);
    return instance;
  } else {
    return new Klass(a1, a2);
  }
};
var threeArgumentPooler = function(a1, a2, a3) {
  var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2, a3);
    return instance;
  } else {
    return new Klass(a1, a2, a3);
  }
};
var fourArgumentPooler = function(a1, a2, a3, a4) {
  var Klass = this;
  if (Klass.instancePool.length) {
    var instance = Klass.instancePool.pop();
    Klass.call(instance, a1, a2, a3, a4);
    return instance;
  } else {
    return new Klass(a1, a2, a3, a4);
  }
};
var fiveArgumentPooler = function(a1, a2, a3, a4, a5) {