fix some comments in accelerator_partitioner.py (#49104)
Summary:
Fix some comments in accelerator_partittioner.py
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49104
Reviewed By: gcatron
Differential Revision: D25434999
Pulled By: scottxu0730
fbshipit-source-id: ce83b411cf959aabec119532ad42a892a2223286