The `cargo fmt` preupload check will be replaced with a rustfmt check
that does not require projects to opt in.
This reverts commit 35bac991e6.
BUG=chromium:908640
TEST=`repo upload`
Change-Id: I08f081ef7b889542a6d95fe3f13cdc480759207c
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1376070
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>