refactor(core): remove all MUI related components and utilities (#4941)

packages/frontend/component/src/components/page-list/utils.tsx

@@ -1,4 +1,3 @@
-import { useMediaQuery, useTheme } from '@mui/material';
 import clsx from 'clsx';
 import {
   type BaseSyntheticEvent,
@@ -8,12 +7,6 @@ import {
 
 import * as styles from './page-list.css';
 
-export const useIsSmallDevices = () => {
-  const theme = useTheme();
-  const isSmallDevices = useMediaQuery(theme.breakpoints.down(900));
-  return isSmallDevices;
-};
-
 export function isToday(date: Date): boolean {
   const today = new Date();
   return (