Removing 'sudo' clause in .travis.yml

Signed-off-by: Markus KARG <markus@headcrashing.eu>
diff --git a/.travis.yml b/.travis.yml
index 61273b2..b317e9f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 dist: trusty
 language: java
-sudo: false
 
 jdk:
   - oraclejdk8