it was added in #5935 but no explanation of why.
if you look at the build output of for example
`packages/@uppy/react/lib/headless/generated/Dropzone.js`:
```js
import { jsx as _jsx } from "react/jsx-runtime";
// This file was generated by build-components.mjs
// ANY EDITS WILL BE OVERWRITTEN!
import { Dropzone as PreactDropzone, } from '@uppy/components';
import { h as preactH, render as preactRender } from 'preact';
// biome-ignore lint/correctness/noUnusedImports: it's needed
import { createElement as h, useContext, useEffect, useRef } from 'react';
import { UppyContext } from '../UppyContextProvider.js';
export default function Dropzone(props) {
const ref = useRef(null);
const ctx = useContext(UppyContext);
useEffect(() => {
if (ref.current) {
preactRender(preactH(PreactDropzone, {
...props,
ctx,
}), ref.current);
}
}, [ctx, props]);
return _jsx("div", { ref: ref });
}
```
as can be seen there is no usage of `h`. `import { jsx as _jsx } from
"react/jsx-runtime";` is being injected for React JSX. see also
https://github.com/transloadit/uppy/pull/5896#issuecomment-3169210799
We drag it in unneccesarily in the bundle and it can cause JSX clashes
in React apps with `"jsx": "preserve"` in their `tsconfig.json`
(https://github.com/preactjs/preact/issues/4908)
- Remove `@types/react` from companion (unused)
- Fix tsconfig's for @uppy/utils (build was fine, but editor diagnostics
weren't)
