AUP3: Removes OD code related to project file handling

This removes all of the OnDemand code embedded throughout
    the main codebase. Individual files related specifically
    to OD have been left in place, but removed from the build.

src/ProjectFileManager.h

@@ -53,9 +53,6 @@ public:
    };
    ReadProjectResults ReadProjectFile( const FilePath &fileName );
 
-   static unsigned int GetODFlags( const WaveTrack &track );
-   void EnqueueODTasks();
-
    // To be called when closing a project that has been saved, so that
    // block files are not erased
    void CloseLock();