Cleanup python version properties am: a545f5b3b6 am: d2bb0af5ba

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/3517118

Change-Id: I8cde928830160fb05817c69289e702a56b783605
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>