Remove the pplbench beanmachine model (#968)
Summary:
This benchmark doesn't cover reasonable pytorch ops and works only on cpu, so we are removing it here.
Fixes https://github.com/pytorch/benchmark/issues/898
Pull Request resolved: https://github.com/pytorch/benchmark/pull/968
Reviewed By: anijain2305
Differential Revision: D37249660
Pulled By: xuzhao9
fbshipit-source-id: 310aadc36919458958723354109160cb065b93a9
