Remove old stub

It is addressed by the previous commit.

tests/foreman/cli/test_satellitesync.py

@@ -2269,29 +2269,3 @@ def test_positive_export_import_consume_incremental_yum_repo(
         # Install the package.
         res = rhel_contenthost.execute(f'dnf -y install {filtered_pkg}')
         assert res.status == 0, f'Installation from the import failed:\n{res.stdout}'
-
-    @pytest.mark.stubbed
-    @pytest.mark.tier3
-    @pytest.mark.upgrade
-    def test_positive_install_package_from_imported_repos(self):
-        """Install packages in client from imported repo of Downstream satellite.
-
-        :id: a81ffb55-398d-4ad0-bcae-5ed48f504ded
-
-        :steps:
-
-            1. Export whole Red Hat YUM repo to a path accessible over HTTP.
-            2. Import the Red Hat repository by defining the CDN URL from the
-               exported HTTP URL.
-            3. In downstream satellite create CV, AK with this imported repo.
-            4. Register/Subscribe a client with a downstream satellite.
-            5. Attempt to install a package on a client from imported repo of
-               downstream.
-
-        :expectedresults:
-            1. The package is installed on client from imported repo of downstream satellite.
-
-        :CaseAutomation: NotAutomated
-
-        :CaseLevel: System
-        """