osx/framework: removed unused property

Headers/Public/VLCLibrary.h

@@ -40,7 +40,6 @@
 @interface VLCLibrary : NSObject 
 {
     void * instance;
-    VLCAudio * audio;
 }
 
 /* Factories */
@@ -50,15 +49,6 @@
  */
 + (VLCLibrary *)sharedLibrary;
 
-/* Properties */
-/**
- * Returns the library's audio object.  This object is used to manipulate the global audio properities of the shared
- * library.
- * \return The library's shared audio instance.
- */
-@property (readonly) VLCAudio * audio;
-
-
 /**
  * Returns the library's version
  * \return The library version example "0.9.0-git Grishenko".