Remove 1745 decorative breaks

* Remove unnecessary null checks in dev/conductor

* review

This reverts commit 9e67070f.

* readability refactor

* update post-submits

Update post submit testing status location from LUCI to cocoon.  Conductor users will still have to use navigation to pick the correct repository and release candidate to monitor.

* lift git-rev-parse in conductor start
* remove localFlutterRoot from globals.dart
* make localFlutterRoot getter private
* fix analysis

* Migrate flutter conductor out of dev/tools and into its own directory

* flesh out documentation

* fix analysis options

* fix integration test

This reverts commit e86f9c7a.

This reverts commit b7f5aef1.