feat!: Remove the course sock and related APIs.

DEPR: https://github.com/openedx/edx-platform/issues/36429

This change removes the course_sock and related API data.  The UI it
removes is on the Legacy Courseware pages which have also been replaced
and have their own [deprecation ticket](https://github.com/openedx/edx-platform/issues/35803)

Before this can be merged, we will need to update the
frontend-app-learning MFE to no longer consume the
`can_show_upgrade_sock` attribute.

BREAKING CHANGE: CourseHomeMetadata, ProgressTab, OutlineTab and
VerifiedMode APIs will no longer have a `can_show_upgrade_sock`
attribute.

lms/djangoapps/course_home_api/outline/tests/test_view.py

@@ -31,7 +31,6 @@ from openedx.core.djangoapps.user_api.tests.factories import UserCourseTagFactor
 from openedx.features.course_duration_limits.models import CourseDurationLimitConfig
 from openedx.features.course_experience import (
     COURSE_ENABLE_UNENROLLED_ACCESS_FLAG,
-    DISPLAY_COURSE_SOCK_FLAG,
     ENABLE_COURSE_GOALS
 )
 from openedx.features.discounts.applicability import (
@@ -362,12 +361,6 @@ class OutlineTabTestViews(BaseCourseHomeTests):
         assert (data['access_expiration'] is not None) == show_enrolled
         assert (data['resume_course']['url'] is not None) == show_enrolled
 
-    @ddt.data(True, False)
-    def test_can_show_upgrade_sock(self, sock_enabled):
-        with override_waffle_flag(DISPLAY_COURSE_SOCK_FLAG, active=sock_enabled):
-            response = self.client.get(self.url)
-            assert response.data['can_show_upgrade_sock'] == sock_enabled
-
     def test_verified_mode(self):
         enrollment = CourseEnrollment.enroll(self.user, self.course.id)
         CourseDurationLimitConfig.objects.create(enabled=True, enabled_as_of=datetime(2018, 1, 1))

lms/djangoapps/course_home_api/serializers.py

@@ -9,7 +9,6 @@ from rest_framework import serializers
 from lms.djangoapps.courseware.utils import verified_upgrade_deadline_link
 from openedx.core.djangoapps.courseware_api.utils import serialize_upgrade_info
 from openedx.features.content_type_gating.models import ContentTypeGatingConfig
-from openedx.features.course_experience import DISPLAY_COURSE_SOCK_FLAG
 from openedx.features.course_experience.utils import dates_banner_should_display
 
 
@@ -59,13 +58,8 @@ class VerifiedModeSerializer(ReadOnlySerializer):
 
     Requires 'course_overview', 'enrollment', and 'request' from self.context.
     """
-    can_show_upgrade_sock = serializers.SerializerMethodField()
     verified_mode = serializers.SerializerMethodField()
 
-    def get_can_show_upgrade_sock(self, _):
-        course_overview = self.context['course_overview']
-        return DISPLAY_COURSE_SOCK_FLAG.is_enabled(course_overview.id)
-
     def get_verified_mode(self, _):
         """Return verified mode information, or None."""
         course_overview = self.context['course_overview']

lms/djangoapps/courseware/tests/test_views.py

@@ -341,7 +341,7 @@ class IndexQueryTestCase(ModuleStoreTestCase):
         self.client.login(username=self.user.username, password=self.user_password)
         CourseEnrollment.enroll(self.user, course.id)
 
-        with self.assertNumQueries(154, table_ignorelist=QUERY_COUNT_TABLE_IGNORELIST):
+        with self.assertNumQueries(152, table_ignorelist=QUERY_COUNT_TABLE_IGNORELIST):
             with check_mongo_calls(3):
                 url = reverse(
                     'courseware_section',

lms/djangoapps/courseware/views/index.py

@@ -48,7 +48,6 @@ from openedx.features.course_experience import (
     default_course_url
 )
 from openedx.features.course_experience.url_helpers import make_learning_mfe_courseware_url
-from openedx.features.course_experience.views.course_sock import CourseSockFragmentView
 from openedx.features.enterprise_support.api import data_sharing_consent_required
 
 from ..access import has_access
@@ -454,9 +453,6 @@ class CoursewareIndex(View):
             table_of_contents['chapters'],
         )
 
-        courseware_context['course_sock_fragment'] = CourseSockFragmentView().render_to_fragment(
-            request, course=self.course)
-
         # entrance exam data
         self._add_entrance_exam_to_context(courseware_context)