feat(IonRouteInner): migrate to functional component and react router 6

packages/react-router/src/ReactRouter/IonRouteInner.tsx

@@ -2,29 +2,8 @@ import type { IonRouteProps } from '@ionic/react';
 import React from 'react';
 import { Route } from 'react-router';
 
-export class IonRouteInner extends React.PureComponent<IonRouteProps> {
-  render() {
-    return (
-      <Route
-        path={this.props.path}
-        exact={this.props.exact}
-        render={this.props.render}
-        {
-          /**
-           * `computedMatch` is a private API in react-router v5 that
-           * has been removed in v6.
-           *
-           * This needs to be removed when we support v6.
-           *
-           * TODO: FW-647
-           */
-          ...((this.props as any).computedMatch !== undefined
-            ? {
-                computedMatch: (this.props as any).computedMatch,
-              }
-            : {})
-        }
-      />
-    );
-  }
-}
+export const IonRouteInner = ({ path, render }: IonRouteProps) => {
+  return (
+    <Route path={path} children={render} />
+  )
+}