Navi: Remove nux folder from within c/b/u/w/welcome.

Bug: 986979
Change-Id: Ifd3da3466ddedbb80c211871663b119405dbbb38
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1715883
Reviewed-by: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Esmael Elmoslimany <aee@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Auto-Submit: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#681097}
21 files changed