Disable unused Python 2 variant. am: 1d9b518c73 am: 2c51ee5233

Original change: https://android-review.googlesource.com/c/platform/external/python/apitools/+/2221448

Change-Id: I57b0cf7cd5d465fa6aaf8af67081de7d9b5bfe54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>