move `tensorboardX` to extra (#16349)
* tensorboardX > extra
* default
* chlog
* doctest_skip
* mypy
* Update docs
* plus
* Apply suggestions from code review
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>
Co-authored-by: Luca Antiga <luca.antiga@gmail.com>
* fix
* mypy
* docs
* Apply suggestions from code review
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>
* .
* ll
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>
Co-authored-by: Luca Antiga <luca.antiga@gmail.com>
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