firmware: drop BundleFirmwareArtifacts.firmware_location

This field is no longer needed (and not used in any chromite version.)

BUG=b:177907747
TEST=generate

Change-Id: I4f1173d115b6301ba0c9a50ccc61fb495118dbf7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2662242
Auto-Submit: LaMont Jones <lamontjones@chromium.org>
Commit-Queue: Michael Mortensen <mmortensen@google.com>
Reviewed-by: Michael Mortensen <mmortensen@google.com>
2 files changed