Removed hack in imageio.cpp where it was allowing an obsolete pvp filetype in read pvp files
Removed hack in imageio.cpp where it was allowing an obsolete pvp filetype in read pvp files

git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@7296 7c0444ca-5550-0410-9008-faecdbe78eb5

dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV