Fix: Remove files form the terrain CMake which do not exist
Fix: Remove files form the terrain CMake which do not exist

--HG--
branch : v1-9

vancepym/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,vancepym/ogre,vancepym/ogre,vancepym/ogre,jhu-lcsr-forks/ogre