AtlasLCG: delete obsolete Python2 Find-modules
Since we don't support Python2 anymore, we may as well delete these obsolete Find-modules:
backports
backports_abc
enum34
functools32
futures
ipaddress
typing
Since we don't support Python2 anymore, we may as well delete these obsolete Find-modules:
backports
backports_abc
enum34
functools32
futures
ipaddress
typing