Revert "certify_bootimg: support --extra_footer_args" am: dc7cea59b3 am: fa2b0539d9

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/2113384

Change-Id: I36d99c4f3ecc6793c2001b9e41e2ad8755a97f68
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>