feat!: Simplify import/export page redirects to always use MFE for courses.

The import and export pages in Studio have been replaced with new views
in the Authoring MFE for courses. The legacy condition guarded by the
'legacy_studio.import' and 'legacy_studio.export' waffle flags is
removed. Courses now always redirect to the MFE; libraries continue to
use the legacy HTML page as v2 libraries are not yet fully rolled out.

This work is part of #36108

BREAKING CHANGE: The 'legacy_studio.import' and 'legacy_studio.export'
waffle flags will no longer be respected for courses. The system will
behave as if the flags are set to false permanently for courses.

Author: irfanuddinahmad

cms/djangoapps/contentstore/views/import_export.py

@@ -43,7 +43,6 @@
 
 from ..storage import course_import_export_storage
 from ..tasks import CourseExportTask, CourseImportTask, export_olx, import_olx
-from ..toggles import use_new_export_page, use_new_import_page
 from ..utils import IMPORTABLE_FILE_TYPES, get_export_url, get_import_url, reverse_course_url, reverse_library_url
 
 __all__ = [
@@ -99,7 +98,7 @@ def import_handler(request, course_key_string):
             return _write_chunk(request, courselike_key)
     elif request.method == 'GET':  # assume html
 
-        if use_new_import_page(courselike_key) and not library:
+        if not library:
             return redirect(get_import_url(courselike_key))
         status_url = reverse_course_url(
             "import_status_handler", courselike_key, kwargs={'filename': "fillerName"}
@@ -358,7 +357,7 @@ def export_handler(request, course_key_string):
         export_olx.delay(request.user.id, course_key_string, request.LANGUAGE_CODE)
         return JsonResponse({'ExportStatus': 1})
     elif 'text/html' in requested_format:
-        if use_new_export_page(course_key) and not library:
+        if not library:
             return redirect(get_export_url(course_key))
         return render_to_response('export.html', context)
     else: