Updated `setup.py` requirements and `requirements.txt`

requirements.txt

+
+jupyterhub==0.7.2

setup.py

@@ -48,13 +48,7 @@ setup_args = dict(
 # setuptools requirements
 if 'setuptools' in sys.modules:
     setup_args['install_requires'] = install_requires = []
-    with open('requirements.txt') as f:
-        for line in f.readlines():
-            req = line.strip()
-            if not req or req.startswith(('-e', '#')):
-                continue
-            install_requires.append(req)
-
+    install_requires.append('jupyterhub')
 
 def main():
     setup(**setup_args)