message: Remove python 3.5 description from setup.py
  Since we already dropped python 3.5 support some time ago,
  this PR removes python 3.5 description from setup.py
diff: @@ -160,10 +160,10 @@ setuptools.setup(
  "Intended Audience :: Science/Research",
  "License :: OSI Approved :: Apache Software License",
  "Programming Language :: Python :: 3",
  - "Programming Language :: Python :: 3.5",
  "Programming Language :: Python :: 3.6",
  "Programming Language :: Python :: 3.7",
  "Programming Language :: Python :: 3.8",
  + "Programming Language :: Python :: 3.9",
  "Programming Language :: Python :: 3 :: Only",
  "Topic :: Scientific/Engineering",
  "Topic :: Scientific/Engineering :: Mathematics",
  @@ -174,7 +174,7 @@ setuptools.setup(
  ],
  keywords="tensorflow io machine learning",
  packages=setuptools.find_packages(where=".", exclude=exclude),
  - python_requires=">=3.5, <3.10",
  + python_requires=">=3.6, <3.10",
  install_requires=install_requires,
  package_data={".": ["*.so"],},
  project_urls={
  