Remove requantization scale constraint. (#37683)
Summary:
Now that we landed float requantization for conv/linear, we do not need
the constraint for requant_scale < 1.
Removing that.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37683
Test Plan: Quantization tests
Differential Revision: D21412536
Pulled By: kimishpatel
fbshipit-source-id: c932b5ab3aa40407e9d7f0c877e2fe7fd544f8a7
