setup.py: Remove code that causes `python setup.py clean` to fail on Windows
setup.py: Remove code that causes `python setup.py clean` to fail on
Windows

klothe/pymssql,bladams/pymssql,pymssql/pymssql,Aloomaio/pymssql,msabramo/pymssql,zerolugithub/pymssql,klothe/pymssql,Aloomaio/pymssql,JimDennis/pymssql,msabramo/pymssql,JimDennis/pymssql,bladams/pymssql,zerolugithub/pymssql,Aloomaio/pymssql,klothe/pymssql,pymssql/pymssql,ramiro/pymssql,ramiro/pymssql,JimDennis/pymssql,ramiro/pymssql,msabramo/pymssql,zerolugithub/pymssql,bladams/pymssql