Revert "Fix React 18.0.0 compatibility by using React namespace imports"

This reverts commit 7a9f539.

Author: justin808

packages/react-on-rails-pro/src/RSCProvider.tsx

@@ -14,8 +14,7 @@
 
 'use client';
 
-import * as React from 'react';
-import { type ReactNode } from 'react';
+import { createContext, useContext, type ReactNode } from 'react';
 import type { ClientGetReactServerComponentProps } from './getReactServerComponent.client.ts';
 import { createRSCPayloadKey } from './utils.ts';
 
@@ -25,7 +24,7 @@ type RSCContextType = {
   refetchComponent: (componentName: string, componentProps: unknown) => Promise<ReactNode>;
 };
 
-const RSCContext = React.createContext<RSCContextType | undefined>(undefined);
+const RSCContext = createContext<RSCContextType | undefined>(undefined);
 
 /**
  * Creates a provider context for React Server Components.
@@ -102,7 +101,7 @@ export const createRSCProvider = ({
  * ```
  */
 export const useRSC = () => {
-  const context = React.useContext(RSCContext);
+  const context = useContext(RSCContext);
   if (!context) {
     throw new Error('useRSC must be used within a RSCProvider');
   }

packages/react-on-rails-pro/src/RSCRoute.tsx

@@ -16,16 +16,15 @@
 
 'use client';
 
-import * as React from 'react';
-import { type ReactNode } from 'react';
+import { Component, use, type ReactNode } from 'react';
 import { useRSC } from './RSCProvider.tsx';
 import { ServerComponentFetchError } from './ServerComponentFetchError.ts';
 
 /**
  * Error boundary component for RSCRoute that adds server component name and props to the error
  * So, the parent ErrorBoundary can refetch the server component
  */
-class RSCRouteErrorBoundary extends React.Component<
+class RSCRouteErrorBoundary extends Component<
   { children: ReactNode; componentName: string; componentProps: unknown },
   { error: Error | null }
 > {
@@ -77,8 +76,8 @@ export type RSCRouteProps = {
 };
 
 const PromiseWrapper = ({ promise }: { promise: Promise<ReactNode> }) => {
-  // React.use is available in React 18.3+
-  const promiseResult = React.use(promise);
+  // use is available in React 18.3+
+  const promiseResult = use(promise);
 
   // In case that an error happened during the rendering of the RSC payload before the rendering of the component itself starts
   // RSC bundle will return an error object serialized inside the RSC payload