Remove Following line from requirements.txt.
pkg-resources==0.0.0
To avoid having it in requirements.txt everytime you do a freeze, remove it from your virtual environment with pip uninstall pkg-resources==0.0.0
pip uninstall pkg-resources==0.0.0
It appears Heroku CLI is using dependencies from a different local branch.If you are running:
$ git push origin master
to deploy your application on Heroku, ensure that locally you are switched to master branch.