Switch Torch-TRT batch size to None (#1967)
Summary:
- Use default batch size, in line with existing Torch benchmarks
- Improve uniformity across benchmarks for direct comparison
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1967
Reviewed By: aaronenyeshi
Differential Revision: D50019326
Pulled By: xuzhao9
fbshipit-source-id: dad5d7e739a3169c7775e2c58d2b32ab96429e14
