patch_manager: appease pylint

Fix unused-argument complaints in unit tests.

BUG=chromium:1042953

TEST=verified locally.

Change-Id: I7037fc10f8160a5f1f8929a3256e91255dd125ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2006330
Reviewed-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Jian Cai <jiancai@google.com>
2 files changed