Revert "IS-3190: Hide alert and store in localstorage (#618)" (#620)

This reverts commit f240006.

Revert "IS-3191: Lagt til url for mer informasjon om varslingsfeil (#617)"

This reverts commit 11fb876.

Revert "IS-3179: Lagt til informasjon om forhåndsvarsler som ikke har blitt sendt ut (#616)"

This reverts commit daaa19f.

Author: mariusfoss

src/components/EksternLenke.tsx

@@ -3,7 +3,6 @@ import { useEffect, useState } from 'react';
 export enum StoreKey {
   SORTING = 'sorting',
   FLEXJAR_ARENABRUK_FEEDBACK_DATE = 'flexjarArenabrukFeedbackDate',
-  HIDE_ALERT_DATE = 'hideAlertDate',
 }
 
 export const useLocalStorageState = <T>(key: StoreKey, initialState: T) => {

src/components/Systemvarsel.tsx

@@ -12,7 +12,6 @@ import { getWeeksBetween } from '@/utils/dateUtils';
 import { useFeatureToggles } from '@/data/unleash/unleashQueryHooks';
 import { TabType, useTabType } from '@/hooks/useTabType';
 import Oversikt from '@/sider/oversikt/Oversikt';
-import Systemvarsel from '@/components/Systemvarsel';
 import NotificationBar from '@/components/error/NotificationBar';
 
 function logPageView(tab: TabType) {
@@ -55,7 +54,6 @@ export default function OversiktContainer(): ReactElement {
       <div className="flex flex-col mx-8">
         <NavigationBar />
         <NotificationBar />
-        <Systemvarsel />
         {personoversiktQuery.isInitialLoading ? (
           <AppSpinner />
         ) : (