message: packages/dev-utils: remove redundant theme wrapping
diff: @@ -18,7 +18,6 @@ import React, { FC, ComponentType } from 'react';
  import ReactDOM from 'react-dom';
  import { BrowserRouter } from 'react-router-dom';
  import BookmarkIcon from '@material-ui/icons/Bookmark';
  -import { ThemeProvider, CssBaseline } from '@material-ui/core';
  import {
  createApp,
  SidebarPage,
  @@ -30,7 +29,6 @@ import {
  ApiTestRegistry,
  ApiHolder,
  } from '@backstage/core';
  -import { lightTheme } from '@backstage/theme';
  import * as defaultApiFactories from './apiFactories';
  // TODO(rugvip): export proper plugin type from core that isn't the plugin class
  @@ -78,16 +76,12 @@ class DevAppBuilder {
  const DevApp: FC<{}> = () => {
  return (
  <AppProvider>
  - <ThemeProvider theme={lightTheme}>
  - <CssBaseline>
  <BrowserRouter>
  <SidebarPage>
  {sidebar}
  <AppComponent />
  </SidebarPage>
  </BrowserRouter>
  - </CssBaseline>
  - </ThemeProvider>
  </AppProvider>
  );
  };
  