Remove CssBaseline from custom theme

Signed-off-by: Andre Wanlin <awanlin@spotify.com>

Author: awanlin

packages/app/src/App.tsx

@@ -42,7 +42,6 @@ import { createApp } from '@backstage/app-defaults';
 import { entityPage } from './components/catalog/EntityPage';
 import { orgPlugin } from '@backstage/plugin-org';
 import { searchPage } from './components/search/SearchPage';
-import CssBaseline from '@mui/material/CssBaseline';
 import { HomepageCompositionRoot, VisitListener } from '@backstage/plugin-home';
 import { HomePage } from './components/home/HomePage';
 import { CustomizableHomePage } from './components/home/CustomizableHomePage';
@@ -102,10 +101,7 @@ const app = createApp({
       title: 'Aperture',
       variant: 'light',
       Provider: ({ children }) => (
-        <UnifiedThemeProvider theme={apertureTheme} noCssBaseline>
-          <CssBaseline />
-          {children}
-        </UnifiedThemeProvider>
+        <UnifiedThemeProvider theme={apertureTheme} children={children} />
       ),
     },
   ],