Disable unused Python 2 variant. am: ece6fb2ed3 am: 7e85dfce85

Original change: https://android-review.googlesource.com/c/platform/external/python/pycparser/+/2222463

Change-Id: I018be7b3a5b1f071d84b55f6d8c58aefbebefbf8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>