Remove Appveyor Python 3.3 builds (html5lib#397)

twm · gsnedders · commit 7facf987f52a · 2018-10-01T12:28:12.000+01:00
It looks like this was missed in html5lib#358. It is causing build failures in html5lib#395 and html5lib#396.
diff --git a/.appveyor.yml b/.appveyor.yml
@@ -6,8 +6,6 @@ environment:
   matrix:
     - TOXENV: py27-base
     - TOXENV: py27-optional
-    - TOXENV: py33-base
-    - TOXENV: py33-optional
     - TOXENV: py34-base
     - TOXENV: py34-optional
     - TOXENV: py35-base
