[web] Cleanup plans-2026-phase-1 - phase 1: frontend (#34619)

* Remove `plans-2026-phase-1` from frontend in subscriptions module

* Remove `plans-2026-phase-1` from general frontend

* Remove empty `AiErrorAssistantPaywall`

* Simplify `UpgradeNotification`

* Update translations

* Fix tests

* Remove `OverleafAssistPaywall`

* Remove unused locales

GitOrigin-RevId: 4cf04bbde134a3f7b778a0695d388f31d9765343

services/web/frontend/js/shared/components/ai-paywall-notification.tsx

@@ -6,7 +6,6 @@ import { useUserFeaturesContext } from '@/shared/context/user-features-context'
 import { useEditorAnalytics } from '@/shared/hooks/use-editor-analytics'
 import { useTranslation } from 'react-i18next'
 import { formatSecondsToHoursAndMinutes } from '@/shared/utils/time'
-import { useFeatureFlag } from '@/shared/context/split-test-context'
 
 import getMeta from '@/utils/meta'
 const hasUnlimitedAi = getMeta('ol-hasUnlimitedAi')
@@ -33,9 +32,7 @@ function AiPaywallNotification({
     premiumSuggestionResetDate,
   } = useEditorContext()
 
-  const { t } = useTranslation()
   const features = useUserFeaturesContext()
-  const inQuotaRollout = useFeatureFlag('plans-2026-phase-1')
   const user = getMeta('ol-user')
 
   const isCommons = user.hasInstitutionLicence
@@ -77,34 +74,6 @@ function AiPaywallNotification({
     return null
   }
 
-  // if not in rollout, use old paywalls for free users
-  if (!inQuotaRollout && !hasAddOn) {
-    return null
-  }
-
-  if (!inQuotaRollout) {
-    // if not in rollout, we can still use our fair usage messages
-    const chattingMessage = t(
-      'youve_reached_the_fair_usage_limit_on_your_plan_you_can_start_chatting_again_in_time',
-      {
-        time: formatSecondsToHoursAndMinutes(t, secondsTillReset),
-      }
-    )
-    const assistMessage = t('youve_reached_the_fair_usage')
-    return (
-      <Notification
-        type="info"
-        title={t('usage_limit_reached')}
-        content={
-          featureLocation === 'workbench' ? chattingMessage : assistMessage
-        }
-        isDismissible={false}
-        customIcon={null}
-        className="ai-paywall-notification"
-      />
-    )
-  }
-
   if (hasAddOn) {
     return (
       <FairUseLimit

services/web/frontend/js/shared/components/upgrade-benefits.tsx

@@ -2,7 +2,6 @@ import MaterialIcon from '@/shared/components/material-icon'
 import { useTranslation } from 'react-i18next'
 import { memo } from 'react'
 import classNames from 'classnames'
-import { useFeatureFlag } from '@/shared/context/split-test-context'
 
 function Check() {
   return <MaterialIcon type="check" />
@@ -10,14 +9,13 @@ function Check() {
 
 function UpgradeBenefits({ className }: { className?: string }) {
   const { t } = useTranslation()
-  const plans2026 = useFeatureFlag('plans-2026-phase-1')
 
   return (
     <ul className={classNames('list-unstyled upgrade-benefits', className)}>
       <li>
         <Check />
         &nbsp;
-        {plans2026 ? t('higher_ai_allowance') : t('unlimited_projects')}
+        {t('higher_ai_allowance')}
       </li>
       <li>
         <Check />