Delete test_rand_quantization (#53234)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53234
Test has been permanently skipped since Nov 2019, see https://github.com/pytorch/pytorch/pull/29463
Test Plan: CI
Reviewed By: mruberry
Differential Revision: D26802660
fbshipit-source-id: ea66be1afd4d7cfbe692594df5d9dd8c29bc5d23
