Do not depend on a specific distribution

Trusty is at end of life and S3Proxy should not depend on much specific from its environment.
2019-06-09 19:04:55 -07:00 · 2019-06-09 19:04:55 -07:00 · 7d7ee0d794
commit 7d7ee0d794
--- a/.travis.yml
+++ b/.travis.yml
@ -1,4 +1,3 @@
-dist: trusty
 language: java
 jdk:
  - openjdk7