[breadcrumb] Remove arrow_left.svg asset added in CL:2090553

The asset is not used after CL:2093072.

Tbr: alex
Bug: 1035691
Change-Id: I719a15922acde88a4d0d4d1641e97d345dd7bc12
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2093071Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747988}

ui/file_manager/file_manager/foreground/images/files/ui/arrow_left.svg

-<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20">
- <polygon points="13.333 6.175 9.213 10 13.333 13.825 12.065 15 6.667 10 12.065 5"/>
-</svg>