Disable unused Python 2 variant. am: 0bfaa056f5 am: c1c8a43433 am: ccebb30b31 am: 61570c03d5 am: 4be5ac0e11

Original change: https://android-review.googlesource.com/c/platform/external/python/pyasn1-modules/+/2221333

Change-Id: If8cd3c74656d01935407a8f782e7566009703ad0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>