Fixed binder reference issues

Author: MSeal

setup.py

@@ -38,8 +38,7 @@ def read_reqs(fname):
 long_description = read(os.path.join(os.path.dirname(__file__), "README.md"))
 requirements = read(os.path.join(os.path.dirname(__file__), "requirements.txt"))
 dev_reqs = read_reqs(os.path.join(os.path.dirname(__file__), 'requirements-dev.txt'))
-binder_reqs = read_reqs(os.path.join(os.path.dirname(__file__), 'binder', 'requirements.txt'))
-extras_require = {"test": dev_reqs, "dev": dev_reqs, "binder": binder_reqs}
+extras_require = {"test": dev_reqs, "dev": dev_reqs}
 
 setup(
     name=name,

tox.ini

@@ -46,6 +46,7 @@ basepython =
     py38: python3.8
     flake8: python3.8
     manifest: python3.8
+    binder: python3.8
     dist: python3.8
     docs: python3.8
 deps = .[dev]