Cosmetic tweak to adaptive_target

[crusaderky]

Trivial follow-up to #8037

[github-actions]

Unit Test Results

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       19 files   -     1         19 suites   - 1   10h 38m 14s ⏱️ + 17m 31s
  3 745 tests  -     3    3 631 ✔️ +    2     106 💤  - 2    8 ❌  - 1 
33 823 runs   - 457  32 129 ✔️  - 444  1 682 💤  - 8  12 ❌  - 3 

For more details on these failures, see this check.

Results for commit 396c205. ± Comparison against base commit a7f7764.

This pull request removes 3 tests.

distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---nanny]
distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---no-nanny]
pytest ‑ internal

[fjetter]

this is not cosmetic but a very minor change to the logic, isn't it?

[crusaderky]

No, it's cosmetic because tasks_ready is not used afterwards. Only cpu is used, and that variable won't change its value in any use case after this change.