fix: remove unused import

src/Sidebar/SidebarListView.tsx

-import React, { CSSProperties, useState } from 'react';
+import React, { CSSProperties } from 'react';
 import SidebarContainer from './SidebarContainer';
 import SidebarListElement from './SidebarListElement';
 import type { PointOfInterest } from '../types/PointOfInterest';