replace useUniqueId() with useId()

there should only be one way to do a thing...

src/utils/react.ts

@@ -1,18 +0,0 @@
-// helper functions for React components
-
-import { useState } from 'react';
-import { createCountFunc } from './iter';
-
-const nextId = createCountFunc();
-
-/**
- * React hook to get a unique identifier, e.g. for linking components via
- * aria-labelledby.
- *
- * @param prefix A namespace prefix for the identifier.
- * @returns A unique identifier in the form "prefix-N"
- */
-export const useUniqueId = (prefix: string): string => {
-    const [uniqueId] = useState(`${prefix}-${nextId()}`);
-    return uniqueId;
-};