Remove __init__.py file to fix base_module import error
Remove __init__.py file to fix base_module import error

Summary:
The `__init__.py` file overwrites the `base_module` import and tests cannot run with the `__init__.py`  file present.
It is only required for Python 2, thus remove it.

Reviewed By: paulinus

Differential Revision: D23572384

fbshipit-source-id: bcd9464bf542be5f6a940ea1053322426edbf168

oscarlorentzon/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,oscarlorentzon/OpenSfM,oscarlorentzon/OpenSfM