rust_uprev: remove the `copy patches` step

Patches no longer have rust's version in them, so we can safely skip
this step now.

BUG=b:266817148
TEST=Unittests

Change-Id: Ib54b2607f25eed5808cd6c544acc5ca3ce3a12f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/4295527
Tested-by: George Burgess <gbiv@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
Reviewed-by: Bob Haarman <inglorion@chromium.org>
2 files changed