Delete setup.py (#9644)

Delete research/setup.py. This is not used by anyone

research/setup.py

-"""Setup script for object_detection."""
-
-from setuptools import find_packages
-from setuptools import setup
-
-
-REQUIRED_PACKAGES = ['Pillow>=1.0', 'Matplotlib>=2.1', 'Cython>=0.28.1']
-
-setup(
-    name='object_detection',
-    version='0.1',
-    install_requires=REQUIRED_PACKAGES,
-    include_package_data=True,
-    packages=[p for p in find_packages() if p.startswith('object_detection')],
-    description='Tensorflow Object Detection Library',
-)