Move from container to VM per Travis requirements (#5367)

earlephilhower · web-flow · commit 016f3b81030e · 2018-11-22T21:29:36.000-08:00
Remove "sudo: false" from travis.yaml due to Travis changes: https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,3 @@
-sudo: false
 language: bash
 os: linux
 dist: trusty
