[build] Remove sudo setting from travis.yml (#462)

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index a34d6c4..d003ad9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: go
-sudo: false
+
 
 matrix:
   include: