[te] Remove vestigial __init__.py from test/cpp/tensorexpr (#49061)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49061
We don't use the python harness for cpp tests anymore.
ghstack-source-id: 118140485
Test Plan: Careful thinking.
Reviewed By: navahgar
Differential Revision: D25410290
fbshipit-source-id: 879e3c6fb296298d567e1d70b18bde96b5cac90d
