Remove deprecated message sending

src/Content.purs

@@ -43,7 +43,7 @@ extractDataAndSendToBackground = do
   dom <- getBrowserDom
   ctx <- getContext dom
   data_ <- extractFromDocument dom
-  sendMessageToBackground RuntimeMessageContentInit
+
   case data_, ctx of
     Left err, _ -> warn $ "[content] " <> show err
     _, Left err -> warn $ "[content] " <> show err