CBD-2753: Removing stale code

This was moved to couchbasebuild/update_manifest_released, along
with a new python_tools/update_manifest_released manifest.

Change-Id: Ib69f5350412015e04afab9fe14d6c91da330cfb6
Reviewed-on: http://review.couchbase.org/c/build-tools/+/164184
Tested-by: Chris Hillery <[email protected]>
Reviewed-by: Chris Hillery <[email protected]>

Author: ceejatec