[SR] Quick hack to eliminate no-op slice (#75774)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75774
`list[0:]` is a no-op. This should really be eliminated on the modeling side, implement as a graph pass for now until we can get this into prod models.
Test Plan: New unit tests
Reviewed By: navahgar
Differential Revision: D35632947
fbshipit-source-id: 0c564193c35039130e99172e0185e124ea24f62d
(cherry picked from commit e01d5273185e39a563c7acb15662d9c1549d4b58)
