Disable unused Python 2 variant. am: 0200b44970 am: 6dddad1492 am: f8e3f87833 am: 3ab1cebf7c am: f4983150da

Original change: https://android-review.googlesource.com/c/platform/external/python/cffi/+/2221328

Change-Id: Ie659fd34789c76d8d9a1441243ca2aa1396dd7a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>