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/favorites/states/favoritesState.ts

@@ -1,8 +0,0 @@
-import { createState } from 'twenty-ui';
-
-import { Favorite } from '@/favorites/types/Favorite';
-
-export const favoritesState = createState<Favorite[]>({
-  key: 'favoritesState',
-  defaultValue: [],
-});