remove unsupported julia versions

SimonDanisch · SimonDanisch · commit 99fcc243b862 · 2016-01-31T14:53:43.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,8 +2,6 @@ language: julia
 sudo: false
 julia:
   - nightly
-  - release
   - 0.4
-  - 0.3
 notifications:
   - email: false
