CI(travis): remove deprecated `sudo` keyword

diff --git a/.travis.yml b/.travis.yml
index a5004c58dae2c315dc0e7e803b07046bec541eae..cf32cab6227b83e06a15c5edebc60e46e9428f8f 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,6 @@ branches:
   only:
     - master
 
-# Prefer docker containers
-sudo: required
-
 language: python
 
 python: