fix: remove support for the legacy courseware pages

Access to learners for these pages has been removed, so we don't
need to keep any support for it around. Simplifies some code paths.

src/shared/data/__factories__/block.factory.js

@@ -47,13 +47,13 @@ Factory.define('block')
     },
   )
   .attr(
-    'legacy_web_url',
-    ['legacy_web_url', 'host', 'courseId', 'id'],
+    'lms_web_url',
+    ['lms_web_url', 'host', 'courseId', 'id'],
     (url, host, courseId, id) => {
       if (url) {
         return url;
       }
 
-      return `${host}/courses/${courseId}/jump_to/${id}?experience=legacy`;
+      return `${host}/courses/${courseId}/jump_to/${id}`;
     },
   );