remove req

Author: asherf

requirements-dev.txt

@@ -8,7 +8,5 @@ nose==1.3.6
 py==1.5.4
 pytest==4.6.10
 pytest-cov==2.6.1
-# wsgiref is included in python standard library in Python 3, and will fail to install.
-wsgiref==0.1.2; python_version < "3.0"
 -r requirements.txt
 -r requirements-rtd.txt