CI(travis): remove deprecated `sudo` keyword

diff --git a/.travis.yml b/.travis.yml
index eace8ca61e2aef584d8717ba6a353ee71f0d618b..a3bc2413c861529a081667fd45d8c523ec19d492 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,9 +6,6 @@ branches:
   only:
     - master
 
-# Prefer docker containers
-sudo: required
-
 language: python
 
 python: