Changeset 11439:b6d5bc19a4f1
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ruby: drop Machine* functions defined with enum MachineType

The previous patch reduced the need for Machine* functions by removing
its use in the Topology class. This patch removes the use from the NetDest
class and other Network related classes. This means that we no longer need to
have static counter variables associated with each controller class. Hence,
the functions related to counts of machines are being dropped.