Noise Reduction IS available (despite what the manual says), but as DVDdoug wrote, it is not well suited to macros due to its peculiar way of working.
There are some tips on the forum for using Noise Reduction. Basically, the first time it is run in a session it will grab the noise sample. On subsequent runs it will apply Noise Reduction, but the Noise Reduction settings are not available to macros, so it just uses the last used settings.