Disable unused Python 2 variant. am: 5933c383ef am: 2ca012491b

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

Change-Id: Ibdc6868bd721fafc0a3d35aa48e76595eee5fc58
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>