Revert "Add mkbootfs to build-tools" am: 8c4e38f41b am: 9c75231ecd am: 8dff40fb4f

Original change: https://android-review.googlesource.com/c/platform/prebuilts/build-tools/+/1696949

Change-Id: I30e5b52049a95ac0a5469c75711445383c822874