After #4335, there are no longer any Docker jobs on Travis CI

Co-Authored-By: Andrew Murray <3112309+radarhere@users.noreply.github.com>

Author: hugovk

.travis.yml

@@ -7,7 +7,7 @@ notifications:
 
 # Run fast lint first to get fast feedback.
 # Run slower CPUs next, to give them a headstart and reduce waiting time.
-# Then run the remainder, with fastest Docker jobs last.
+# Then run the remainder.
 
 matrix:
   fast_finish: true