Summary: In https://github.com/facebook/Ax/issues/387, users are having issue importing from the botorch_modular module. Maybe it's because of the missing __init__.py. But I have no clue how this works **without** it . . .

Reviewed By: lena-kashtelyan

Differential Revision: D24031280

fbshipit-source-id: 3cbfebf3f756927a78979941676d8c2aa34ac2f7