Cleanup python version properties am: 560aef5be6

Original change: https://android-review.googlesource.com/c/trusty/vendor/google/aosp/+/3516267

Change-Id: I82311e853549dc220fb9f46e9f3bd29a0ed72d96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>