Remove appveyor configs

Author: lorien

appveyor.yml

@@ -6,11 +6,3 @@ commands =
     ./runtest.py {posargs}
 deps = 
     -rrequirements_dev.txt
-
-[testenv:py-appveyor]
-passenv = DISTUTILS_USE_SDK MSSdk INCLUDE LIB
-commands =
-    {envpython} runtest.py {posargs}
-deps =
-    -rrequirements_dev.txt
-    win_inet_pton