Revert "Refactor Controller: base on ServoModule."

This reverts commit f926041ab435d82bbe6ec9a37f484a3e34c57b93.
Revert "Refactor Motor: base on ServoModule."

This reverts commit e622258411761270fcaded474baffa2f92124305.
Revert "Refactor DigitalOut: base on ServoModule"

This reverts commit 97ed67aca37377ab629e5347843579bbbb0914aa.
Revert "Refactor DigitalIn: base on ServoModule"

This reverts commit 2ab2e42c1883a607847df5f2b44ab624a8652a1d.
Revert "Refactor CmdUpdateFrequency; derive from ServoModule."

This reverts commit b33fc4a85bb2c346a031e2eaf34e73e68580d9ca.
Revert "Create ServoModule."

This reverts commit cec28bce810cd5b55f2a123ad9f03dd96cba981a.