React warning thrown when attempting to reset a controlled async combobox.

# 🐛 Bug Report

I'm using the second AsyncLoadingExample here https://react-spectrum.adobe.com/react-spectrum/ComboBox.html#asynchronous-loading. I then add an action button with the intent of resetting the combobox:

```
{
list.removeSelectedItems();
list.setFilterText('');
}}> Reset
```

While this does clear the combobox, it produces the warning: `WARN: A component changed from controlled to uncontrolled.`.

## 🤔 Expected Behavior

There should be no warning.

## 😯 Current Behavior

```
react_devtools_backend.js:4026 WARN: A component changed from controlled to uncontrolled.
at ComboBoxBase (http://localhost:3000/static/js/bundle.js:55827:34)
at $2289f375e813f187$var$ComboBox (http://localhost:3000/static/js/bundle.js:55814:85)
...
```

## 💁 Possible Solution

?

## 🔦 Context

This is a minor inconvenience. I'm filing at the request of one of the Spectrum developers who said:

```
it's possible this might be a bug in useAsyncList/useListData, I'll need to dig some more. At the very least, removeSelectedItems shouldn't be throwing that warning it at all possible, mind filing an issue for this?
```

## 💻 Code Sample

https://codesandbox.io/s/falling-star-r9pf1z?file=/package.json

## 🌍 Your Environment

| Software | Version(s) |
| ---------------- | ---------- |
| react-spectrum | 3.17.0 |
| Browser | Chrome |
| Operating System | Mac |

Start by reproducing the warning with the second AsyncLoadingExample from the ComboBox documentation and the reset handler using removeSelectedItems and setFilterText. Read the useAsyncList/useListData behavior involved in the controlled async ComboBox, then verify the reset clears the component without a controlled-to-uncontrolled warning.

Written by the indexing model from the issue text.