Delete Pytorch 1.8 tests
Created by: punitkoura
🚀 Feature Request
Pytorch 1.8 is behind the setup we plan to support, and we are already using Pytorch 1.9 or greater. Let's deprecate Pytorch 1.8 tests.
Motivation
Since we do not plan to support Pytorch 1.8, we do not need to test on pytorch 1.8.