fix: remove old croudsourcing translation for videos (#42880)

client/src/templates/Challenges/video/Show.tsx

@@ -241,20 +241,6 @@ class ShowVideo extends Component<ShowVideoProps, ShowVideoState> {
                     // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
                     videoId={videoId}
                   />
-                  <i>
-                    <a
-                      href={
-                        'https://www.youtube.com/timedtext_editor?action_mde_edit_form=1&v=' +
-                        videoId +
-                        '&lang=en&bl=watch&ui=hd&ref=wt&tab=captions'
-                      }
-                      rel='noopener noreferrer'
-                      target='_blank'
-                    >
-                      {t('learn.add-subtitles')}
-                    </a>
-                    .
-                  </i>
                 </div>
               </Col>
               <Col md={8} mdOffset={2} sm={10} smOffset={1} xs={12}>