Remove unused import from Pressable.js

Summary:
All callsites for `useImperativeHandle` have been removed, so we can also remove the import from react.

## Changelog
[General][Internal]

Reviewed By: mogers

Differential Revision: D50457268

fbshipit-source-id: edc4a57f2e72213138b7eb896afdaaec2d126161

packages/react-native/Libraries/Components/Pressable/Pressable.js

@@ -30,7 +30,7 @@ import useAndroidRippleForView, {
   type RippleConfig,
 } from './useAndroidRippleForView';
 import * as React from 'react';
-import {useImperativeHandle, useMemo, useRef, useState} from 'react';
+import {useMemo, useRef, useState} from 'react';
 
 type ViewStyleProp = $ElementType<React.ElementConfig<typeof View>, 'style'>;