[travis] Remove sudo: false

Travis now recommends removing `sudo: false` from configuration: https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration.
6 years ago · 7aeb788e56
1 changed files with 0 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -9,7 +9,6 @@ python:
  - "3.6"
  - "pypy"
  - "pypy3"
-sudo: false
 env:
  - YTDL_TEST_SET=core
  - YTDL_TEST_SET=download