ENH: Remove unecessary SimpleITK builds from BRAINSTools.

The necesssary tools for BRAINSTools builds with AutoWorkup is now part of the
NAMICExternalProjects builds.  Remove duplicated building steps from the BRAINSTools
build to simplify dependancies.
COMP: Enhance compilation performance of BRAINSFit

Remove items that are now only necessary as part of NEP.  This will allow for
fewer options to manage and faster overall compilations.
COMP: Propogate QT options flags.