fix: remove unused import toZonedTime

Author: anthogez

graph-tutorial/src/GraphService.ts

@@ -5,7 +5,7 @@
 import { Client, GraphRequestOptions, PageCollection, PageIterator } from '@microsoft/microsoft-graph-client';
 import { AuthCodeMSALBrowserAuthenticationProvider } from '@microsoft/microsoft-graph-client/authProviders/authCodeMsalBrowser';
 import { endOfWeek, startOfWeek } from 'date-fns';
-import { toZonedTime, fromZonedTime } from 'date-fns-tz';
+import { fromZonedTime } from 'date-fns-tz';
 import { User, Event } from '@microsoft/microsoft-graph-types';
 
 let graphClient: Client | undefined = undefined;