* chore: update pre-commit versions
* ci: remove old configurations
* ci: copy workflow from prototorch
* ci: run precommit for all files
* ci: add examples CPU test
* ci(test): failing example test
* ci: fix workflow definition
* ci(test): repeat failing example test
* ci: fix workflow definition
* ci(test): repeat failing example test II
* ci: fix test command
* ci: cleanup example test
* ci: remove travis badge
models/unsupervised.py uses `pt` in line 37, but `pt` is undefined in the file.
I wonder why Python doesn't complain about this. Perhaps because unsupervised.py
is never run in isolation and `pt` is otherwise available in the namespace of
the example scripts that use unsupervised.py.
