feat: removes Upgrade Notification as default content

As a follow-up to
https://github.com/openedx/frontend-app-learning/pull/1368, remove the
UpgradeNotification component from the sidebar's default content.

src/courseware/course/sidebar/sidebars/notifications/NotificationTray.jsx

@@ -5,7 +5,6 @@ import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 import { PluginSlot } from '@openedx/frontend-plugin-framework';
 import { getAuthenticatedUser } from '@edx/frontend-platform/auth';
 import { useModel } from '@src/generic/model-store';
-import UpgradeNotification from '../../../../../generic/upgrade-notification/UpgradeNotification';
 
 import messages from '../../../messages';
 import SidebarBase from '../../common/SidebarBase';
@@ -23,17 +22,11 @@ const NotificationTray = ({ intl }) => {
   const course = useModel('coursewareMeta', courseId);
 
   const {
-    accessExpiration,
-    contentTypeGatingEnabled,
     end,
     enrollmentEnd,
     enrollmentMode,
     enrollmentStart,
-    marketingUrl,
-    offer,
     start,
-    timeOffsetMillis,
-    userTimezone,
     verificationStatus,
   } = course;
 
@@ -90,23 +83,7 @@ const NotificationTray = ({ intl }) => {
               notificationCurrentState: upgradeNotificationCurrentState,
               setNotificationCurrentState: setUpgradeNotificationCurrentState,
             }}
-          >
-            <UpgradeNotification
-              offer={offer}
-              verifiedMode={verifiedMode}
-              accessExpiration={accessExpiration}
-              contentTypeGatingEnabled={contentTypeGatingEnabled}
-              marketingUrl={marketingUrl}
-              upsellPageName="in_course"
-              userTimezone={userTimezone}
-              shouldDisplayBorder={false}
-              timeOffsetMillis={timeOffsetMillis}
-              courseId={courseId}
-              org={org}
-              upgradeNotificationCurrentState={upgradeNotificationCurrentState}
-              setupgradeNotificationCurrentState={setUpgradeNotificationCurrentState}
-            />
-          </PluginSlot>
+          />
         ) : (
           <p className="p-3 small">{intl.formatMessage(messages.noNotificationsMessage)}</p>
         )}

src/courseware/course/sidebar/sidebars/notifications/NotificationTray.test.jsx

@@ -94,26 +94,6 @@ describe('NotificationTray', () => {
     expect(screen.getByTestId('notification_tray_slot')).toBeInTheDocument();
   });
 
-  it('renders upgrade card', async () => {
-    await fetchAndRender(
-      <SidebarContext.Provider value={{
-        currentSidebar: ID,
-        courseId,
-      }}
-      >
-        <NotificationTray />
-      </SidebarContext.Provider>,
-    );
-
-    expect(document.querySelector('.upgrade-notification')).toBeInTheDocument();
-
-    expect(screen.getByRole('link', { name: 'Upgrade for $149' }))
-      .toBeInTheDocument();
-    expect(screen.queryByText('You have no new notifications at this time.'))
-      .not
-      .toBeInTheDocument();
-  });
-
   it('renders no notifications message if no verified mode', async () => {
     setMetadata({ verified_mode: null });
     await fetchAndRender(