Remove named tensor builds from CI (#27762)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27762
These are now unnecessary because all of the named tensor tests run on
regular CI.
Test Plan: - verify that there are no named tensor builds on this PR.
Differential Revision: D17915432
Pulled By: zou3519
fbshipit-source-id: 64b0c0bc41af65762fa953b273c64f1b338b80ca
