That means to remove it from:

• README.rst
• CONTRIBUTING.rst
• .pre-commit-config.yaml
• .travis.yml
• appveyor.yml
• setup.py
• tox.ini
• all tests (hihi)

We can even think about dropping all the python2 workarounds we have in the library itself:

• removefuture from requirements and all the imports
• _UTC intelegram.utils.helpers
• Workaround intelegram.InputFile.__init__()
• from builtins import str intelegram.utilts.request
• test_send_on_server_emoji
• imports intest.updater

(This list is not comprehensive)