chore: updated the notification section description

src/notification-preferences/NotificationSettings.jsx

@@ -20,13 +20,10 @@ const NotificationSettings = () => {
         <h2 className="notification-heading mb-3">
           {intl.formatMessage(messages.notificationHeading)}
         </h2>
-        <div className="text-gray-700 font-size-14 mb-3">
-          {intl.formatMessage(messages.accountNotificationDescription)}
-        </div>
         <div className="text-gray-700 font-size-14 mb-3">
           {intl.formatMessage(messages.notificationCadenceDescription, {
             dailyTime: '22:00 UTC',
-            weeklyTime: '22:00 UTC Every Sunday',
+            weeklyTime: '22:00 UTC',
           })}
         </div>
         <div className="mb-5 text-gray-700 font-size-14">

src/notification-preferences/messages.js

@@ -91,14 +91,9 @@ const messages = defineMessages({
     defaultMessage: 'Notifications for certain activities are enabled by default,',
     description: 'Body of the notification preferences for learner guide',
   },
-  accountNotificationDescription: {
-    id: 'account.notification.description',
-    defaultMessage: 'Account-level settings apply to all courses.',
-    description: 'Account notification description',
-  },
   notificationCadenceDescription: {
     id: 'notification.cadence.description',
-    defaultMessage: 'Daily notifications are delivered at {dailyTime}. Weekly notifications are delivered at {weeklyTime}.',
+    defaultMessage: 'Daily email notifications are sent at {dailyTime}. Weekly email notifications are sent every Sunday at {weeklyTime}.',
     description: 'Notification cadence description',
   },
   notificationDefaultInfo: {