actions: drop typed dispatch

This doesn't provide much benefit and is just one more rule to remember,
so we can do without it.

src/editor/Editor.tsx

@@ -12,8 +12,8 @@ import tomorrowNightEightiesTheme from 'monaco-themes/themes/Tomorrow-Night-Eigh
 import xcodeTheme from 'monaco-themes/themes/Xcode_default.json';
 import React, { useRef } from 'react';
 import MonacoEditor, { monaco } from 'react-monaco-editor';
+import { useDispatch } from 'react-redux';
 import { IDisposable } from 'xterm';
-import { useDispatch } from '../actions';
 import { fileStorageWriteFile } from '../fileStorage/actions';
 import { compile } from '../mpy/actions';
 import { useSelector } from '../reducers';

src/editor/OpenButton.tsx

@@ -2,7 +2,7 @@
 // Copyright (c) 2020-2021 The Pybricks Authors
 
 import React from 'react';
-import { useDispatch } from '../actions';
+import { useDispatch } from 'react-redux';
 import * as notificationActions from '../notifications/actions';
 import { useSelector } from '../reducers';
 import OpenFileButton, { OpenFileButtonProps } from '../toolbar/OpenFileButton';

src/editor/SaveAsButton.tsx

@@ -2,7 +2,7 @@
 // Copyright (c) 2020-2021 The Pybricks Authors
 
 import React from 'react';
-import { useDispatch } from '../actions';
+import { useDispatch } from 'react-redux';
 import * as editorActions from '../editor/actions';
 import { useSelector } from '../reducers';
 import ActionButton, { ActionButtonProps } from '../toolbar/ActionButton';