Remove python2 from atest bazel am: 424c772c0a am: 141c3444dc

Original change: https://android-review.googlesource.com/c/platform/tools/asuite/+/3336353

Change-Id: I49c27c7f5a27281969f2fd516626fb22e531fb64
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>