Disable unused Python 2 variant. am: c2665c9956 am: cacd92c6ca

Original change: https://android-review.googlesource.com/c/platform/external/python/python-api-core/+/2221803

Change-Id: If87180918d7d6105c82de1e816eee07e040e7511
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>