fix build issue

Author: chfw

.travis.yml

@@ -8,7 +8,6 @@ python:
   - 2.7
   - 3.3
   - 3.4
-  - 3.5
 install:
   - pip install -r requirements.txt
   - pip install -r test_requirements.txt

polls/views.py

@@ -6,12 +6,7 @@
 from polls.models import Question, Choice
 import pyexcel.ext.xls
 import pyexcel.ext.xlsx
-import sys
-PY2 = sys.version_info[0] == 2
-if PY2:
-    import pyexcel.ext.ods
-else:
-    import pyexcel.ext.ods3
+import pyexcel.ext.ods3
 
 
 data = [