Revert "certify_bootimg: support --extra_footer_args" am: dc7cea59b3 am: fa2b0539d9 am: 7d6c797e2c am: 5a2b951d16 am: 3b2217d3f6

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

Change-Id: Idb933b6e482835c17a0e9ffbee4a458a1cd2b7d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>