Revert "feat: Adds discussions settings for new discusions experience [BD-38] [TNL-8621] [BB-4854]"

[ormsbee]

Reverts edx/edx-platform#28749

The commit being reverted caused the following test failure on the master branch:

Error Message
AssertionError: assert True == False
  +True
  -False
Stacktrace
self = <openedx.features.lti_course_tab.tests.DiscussionLtiCourseTabTestCase testMethod=test_pii_params_on_discussion_lti_tab_1_True>
discussion_config_enabled = True

    @ddt.data(True, False)
    @patch('common.djangoapps.student.models.CourseEnrollment.is_enrolled', Mock(return_value=True))
    def test_pii_params_on_discussion_lti_tab(self, discussion_config_enabled):
        self.discussion_config.enabled = discussion_config_enabled
        self.discussion_config.save()
        tab = self.check_discussion_tab()
>       self.check_can_display_results(
            tab,
            for_staff_only=True,
            for_enrolled_users_only=True,
            expected_value=discussion_config_enabled,
        )

openedx/features/lti_course_tab/tests.py:48: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <openedx.features.lti_course_tab.tests.DiscussionLtiCourseTabTestCase testMethod=test_pii_params_on_discussion_lti_tab_1_True>
tab = <openedx.features.lti_course_tab.tab.DiscussionLtiCourseTab object at 0x7f65d7fca430>
expected_value = True, for_authenticated_users_only = False
for_staff_only = True, for_enrolled_users_only = True

    def check_can_display_results(
            self,
            tab,
            expected_value=True,
            for_authenticated_users_only=False,
            for_staff_only=False,
            for_enrolled_users_only=False
    ):
        """Checks can display results for various users"""
        if for_staff_only:
            user = self.create_mock_user(is_staff=True, is_enrolled=True)
>           assert expected_value == self.is_tab_enabled(tab, self.course, user)
E           AssertionError: assert True == False
E             +True
E             -False

lms/djangoapps/courseware/tests/test_tabs.py:164: AssertionError

@dianakhuang points out that this may be because of an adverse interaction with:

• https://github.com/edx/edx-platform/pull/29110

[ormsbee]

FYI @xitij2000, @awaisdar001, @asadazam93, @Agrendalath

[edx-status-bot]

Your PR has finished running tests. There were no failures.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.