DATAJPA-1450 - Remove sudo from .travis.yml.

sudo in .travis.yml won't have any effect anymore soon and it isn't necessary anymore.

Original pull request: #299.

Author: koraktor

Diff for: .travis.yml

@@ -21,8 +21,6 @@ addons:
     packages:
     - oracle-java8-installer
 
-sudo: false
-
 cache:
   directories:
     - $HOME/.m2