CrOS FilesApp remove unneeded crostini css important

The css !important is no longer needed since crostini is not
using the nassh FSP provided volume type.

Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: I8a2803b934efbe7a1af8bbba0dd897987f28b3b7
Reviewed-on: https://chromium-review.googlesource.com/1139833
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575540}
1 file changed