Remove unnecessary model attribute assignment on 'freqs_cis' (#1766)
Summary:
Fixes https://github.com/pytorch/benchmark/issues/1767, more details there.
Upstream PR link https://github.com/facebookresearch/llama/pull/349
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1766
Reviewed By: msaroufim
Differential Revision: D47556245
Pulled By: xuzhao9
fbshipit-source-id: 5ad541ff3e38a36b6515b1b7135b3da92109c9f5