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/activities/states/activityTitleFamilyState.ts

@@ -1,9 +0,0 @@
-import { createFamilyState } from '@/ui/utilities/state/utils/createFamilyState';
-
-export const activityTitleFamilyState = createFamilyState<
-  string,
-  { activityId: string }
->({
-  key: 'activityTitleFamilyState',
-  defaultValue: '',
-});

packages/twenty-front/src/modules/activities/states/targetableObjectsInDrawerState.ts

@@ -1,10 +0,0 @@
-import { createState } from 'twenty-ui';
-
-import { ActivityTargetableObject } from '@/activities/types/ActivityTargetableEntity';
-
-export const targetableObjectsInDrawerState = createState<
-  ActivityTargetableObject[]
->({
-  key: 'targetableObjectsInDrawerState',
-  defaultValue: [],
-});