Remove some dead code (#6611)

We could remove a lot more than this, this is just a start.

There are various tools to help with this, knip is a good one

packages/twenty-front/src/modules/localization/utils/formatDataTime.ts

@@ -1,15 +0,0 @@
-import { formatInTimeZone } from 'date-fns-tz';
-import { parseDate } from '~/utils/date-utils';
-
-export const formatDatetime = (
-  date: Date | string,
-  timeZone: string,
-  dateFormat: string,
-  timeFormat: string,
-) => {
-  return formatInTimeZone(
-    parseDate(date).toJSDate(),
-    timeZone,
-    `${dateFormat} ${timeFormat}`,
-  );
-};