Remove deprecated ATTR_VIA_DEVICE from Stromer device info

[Copilot]

Home Assistant 2026.9.1 logs deprecation warnings for the deprecated ATTR_VIA_DEVICE constant and via_device argument used by this integration. HA Core will remove them in 2027.8.

• entity.py
  • Drop the ATTR_VIA_DEVICE import and the ATTR_VIA_DEVICE: None entry in the DeviceInfo update.
  • The value was always None, so the device never had a parent. Omitting the key gives the same registry result, and the device hierarchy is unchanged.

-from homeassistant.const import ATTR_NAME, ATTR_VIA_DEVICE
+from homeassistant.const import ATTR_NAME
 ...
         self._attr_device_info.update(
             {
                 ATTR_NAME: data.get("bike_name"),
-                ATTR_VIA_DEVICE: None,
             }
         )

• __init__.py: no change. It already calls async_update_device(..., via_device_id=None), which is the current pattern. It also clears any stale parent link left on existing devices.
• No other via_device or ATTR_VIA_DEVICE references remain in the integration.
• No tests added, since the change removes a no-op.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud