Reorganize lint travis builds (#10670)

* tox cleanup

* 1 tox step

* Revert pytest sugar changes

* Tox: make pylint its own task

* Bump Travis to 30 minutes timeout

script/setup

@@ -5,7 +5,6 @@
 set -e
 
 cd "$(dirname "$0")/.."
-git submodule init
 script/bootstrap
 
 pip3 install -e .