[hmmbob]

Reconfiguring PoolLab schedules a reload through both its update listener and async_update_reload_and_abort. Home Assistant warns that this combination stops working in 2026.12. Reauthentication can likewise reload twice because it updates the entry and then explicitly reloads it.

Remove the redundant update listener and its callback. Both config-flow paths already perform the required reload, including when credentials are unchanged. This follows the documented option to retain config-flow reloads and remove the listener, and avoids requiring a newer config-flow helper.

Validation:

• Four regression cases pass on Home Assistant 2026.10.1 / Python 3.14, covering reauthentication and reconfiguration with changed and unchanged credentials; each reloads exactly once.
• On unchanged upstream code, these tests reproduce duplicate reloads and the warning reported in Update Listener #68 (3 failures, 1 pass).
• All 11 tests pass when this change is combined with Clarify PoolLab API timeout and empty error messages #70 and Fix translation validation and current Home Assistant test compatibility #71 in an isolated test checkout.
• The same cases exercise the existing setup and config-flow code with mocked cloud calls.
• git diff --check passes.

Fixes #68.

Reference: https://developers.home-assistant.io/blog/2026/05/07/config-entry-listener-together-with-reloading-methods/

No polling, timeout, sensor-write or error-message changes are included; the patch attached to #69 does not address this reload issue. The existing Hassfest translation failure and test collection compatibility issue are handled separately in #71.