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

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

Change-Id: I4143dda07c62b66cc2041ea4cea51d824006cd97
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>