Revert "Restored r_orthographic behavior."
This reverts commit 26908f5bc5.
Revert "Changed all of the isometric functionality to mapinfo and playerinfo variables. Retained function of most of the CVars."
This reverts commit dc897eacc0.
Revert "Adding isometric camera mode with orthographic projection to current state of master branch of GZDoom."
This reverts commit d2c2c93cf1.