Disable unused Python 2 variant. am: f0dce18dba

Original change: https://android-review.googlesource.com/c/platform/external/python/google-api-python-client/+/2221330

Change-Id: Ib95b7ea6d8027dbdea9400b6cdd1aa34e81336c1
Signed-off-by: Automerger Merge Worker <[email protected]>