Clean up no longer needed support for TILE NAVSUGGEST MV tiles.

Change-Id: I155dfc3f99252d5d3d592f8eedeca4dfa8bfa3c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5428162


Auto-Submit: Tomasz Wiszkowski <ender@google.com>
Commit-Queue: Gang Wu <gangwu@chromium.org>
Reviewed-by: Gang Wu <gangwu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283513}