Fix for Mantis 2861: Make sure we switch off shader-based effect rendering if the GPU can't handle it


git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9718 387891d4-d844-0410-90c0-e4c51a9137d3
Removes a console command that basically amounted to being a more elaborate way of causing an Int3()


git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9719 387891d4-d844-0410-90c0-e4c51a9137d3