Remove navbar lint suppressions

Lint is no longer incorrectly generating errors for valid v27 usages of
these navbar APIs, so we can now remove these suppressions.

Bug: 856861
Change-Id: If211e8446ad2eb13634b7134b778e2e5b5a0b2f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2065848
Commit-Queue: Theresa  <twellington@chromium.org>
Auto-Submit: Natalie Chouinard <chouinard@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743131}