Don't force Python 3.4 on Travis

Looking at output like https://travis-ci.org/spotify/luigi/jobs/85983702 implies all tests are currently run using Python 3.4. That's no good.
puzuwe · Oct 18, 2015 · 6f6879a · 6f6879a
1 parent e522938
commit 6f6879a
Showing 1 changed file with 0 additions and 1 deletion.
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,4 @@
 language: python
-python: 3.4
 
 jdk: oraclejdk7