Merge pull request #350 from mdekstrand/tweak/cleanup-extensions · lenskit/lkpy@154086e

lenskit/algorithms/als.py:3:8: F401 `warnings` imported but unused

lenskit/algorithms/funksvd.py:11:32: F401 `pandas.core.series.Series` imported but unused

lenskit/batch/_train.py:3:29: F401 `lenskit.sharing.persist` imported but unused

lenskit/topn.py:7:1: F403 `from .metrics.topn import *` used; unable to detect undefined names

lenskit/topn.py:17:2: F405 `bulk_impl` may be undefined, or defined from star imports

lenskit/util/log.py:8:27: F401 `multiprocessing` imported but unused

lenskit/util/random.py:6:8: F401 `zlib` imported but unused

lenskit/util/random.py:8:8: F401 `random` imported but unused

source code lint check failed

lint failed but non-mandatory

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

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