remove unused capture (#16526)
Summary:
We don't use this in the lambda body anymore. Remove it to fix a warning.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16526
Differential Revision: D13867043
Pulled By: umanwizard
fbshipit-source-id: 4c9a9d194fdfcb63fde16823517d2c6c8e2ae93d
