CI(travis): remove deprecated `sudo` keyword

diff --git a/.travis.yml b/.travis.yml
index d7b6ba603fff8fd92e6742da091072a7c0c93420..296296e3a2f9d5ca9688d837d865366a798372d2 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,9 +6,6 @@ branches:
   only:
     - master
 
-# Prefer docker containers
-sudo: required
-
 language: python
 
 python: