feat: name no warnings and report no package proxy (0.5.0)

napalm-linux 0.9.0 names no warnings (netOrk #1111), so the override that
kept the inherited get_device_warnings from asking for updates goes. The
package proxy it now reports is switched off with the template that sets
it: QTS has no apt. Requires napalm-linux 0.9.0.

tests/test_qnap_qts.py

@@ -232,14 +232,15 @@ class TestFixesQtsCannotTake:
     capability check -- is it callable? -- answers no."""
 
     @pytest.mark.parametrize(
-        "name", ["configure_snmp_agent", "configure_package_proxy", "ensure_package"]
+        "name",
+        ["configure_snmp_agent", "configure_package_proxy", "get_package_proxy", "ensure_package"],
     )
     def test_switched_off(self, name):
         assert getattr(QnapQtsDriver, name) is None
 
 
-def test_device_warnings_do_not_ask_for_updates_qts_cannot_list():
-    """The inherited get_device_warnings called get_available_updates, which is
-    None here, and logged a TypeError on every poll (#6)."""
-    driver = QnapQtsDriver("nas", "admin", "pw")
-    assert driver.get_device_warnings() == []
+def test_no_warnings_of_its_own():
+    """napalm-linux names no warnings any more (netOrk #1111), so neither does
+    this driver; the override that kept the inherited one from asking for updates
+    QTS cannot list (#6) is gone with it."""
+    assert not callable(getattr(QnapQtsDriver, "get_device_warnings", None))