Disable unused Python 2 variant. am: 5933c383ef am: 2ca012491b am: 0326e33f9b am: 51ea2c60c5 am: 23c2303e2b

Original change: https://android-review.googlesource.com/c/platform/external/python/uritemplates/+/2221335

Change-Id: If53126d90d13673b30866a8ac331808add2c3e2e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>