CI: drop sudo entry from .travis.yml

pavoljuhas · pavoljuhas · commit f3071c74b94c · 2019-01-14T17:15:29.000-05:00
Container based builders are retired at travis so this is not needed https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,3 @@
-sudo: required
-
 language: cpp
 
 os:
