Remove unused header am: 80ba2feaea am: ef858d9c6e am: bf26d51e4c

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2774951

Change-Id: Icfeec70e7a20786bbc2782a9235f220a6eaa192d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>