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.

napalm_qnap_qts/qnap_qts.py

@@ -78,16 +78,14 @@ class QnapQtsDriver(StorageDriver, HypervisorDriver, LinuxDriver):
     get_available_updates = None  # type: ignore[assignment]
     refresh_available_updates = None  # type: ignore[assignment]
     apply_updates = None  # type: ignore[assignment]
-    #: The fix templates LinuxDriver carries need a package manager or net-snmp
-    #: from packages; QTS has neither, and its SNMP agent is set in its own UI.
+    #: The fix templates LinuxDriver carries, and the package proxy it reports,
+    #: need a package manager or net-snmp from packages; QTS has neither, and
+    #: its SNMP agent is set in its own UI.
     configure_snmp_agent = None  # type: ignore[assignment]
     configure_package_proxy = None  # type: ignore[assignment]
+    get_package_proxy = None  # type: ignore[assignment]
     ensure_package = None  # type: ignore[assignment]
 
-    def get_device_warnings(self) -> list:
-        """Nothing to report: the inherited one asks for updates QTS cannot list."""
-        return []
-
     SNMP_OBJECT_ID_PREFIX = QNAP_ENTERPRISE_OID
     SNMP_FINGERPRINT = [
         FingerprintRule("qnap", weight=9.0),