Remove confusing comment since command classes already tell such binding
code about being a master and/or slave command. Comment otherwise
becomes unnecessary as well as a maintenance trap -if any such master
/slave annotation changes in command class(es).
Remove redundant binding (duplicated line) for CreateAccountCommand
-still in DefaultCommandModule.
Change-Id: Ieaf8d98c951a3f471216cc651b22ad54eb6db6b6
a10d6b7244