Disable unused Python 2 variant. am: 3f0a736d66 am: 6dcceb3be8 am: 6328debc9c am: a34d5dfced

Original change: https://android-review.googlesource.com/c/platform/external/python/dateutil/+/2221449

Change-Id: I9ee00ee8fec7f106817420248429f3970353e65f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>