Exclude Py3.3 from appveyor builds as it is out of maintenance anyway and...

Exclude Py3.3 from appveyor builds as it is out of maintenance anyway and isn't really supported by external packages anymore.

appveyor.yml

@@ -17,14 +17,6 @@ environment:
       PYTHON_VERSION: "2.7"
       PYTHON_ARCH: "64"
 
-    - PYTHON: "C:\\Python33"
-      PYTHON_VERSION: "3.3"
-      PYTHON_ARCH: "32"
-
-    - PYTHON: "C:\\Python33-x64"
-      PYTHON_VERSION: "3.3"
-      PYTHON_ARCH: "64"
-
     - PYTHON: "C:\\Python34"
       PYTHON_VERSION: "3.4"
       PYTHON_ARCH: "32"