Remove duplicated declaration.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4657 0c269be4-1314-0410-8aa9-9f06e86f4224

linux/driver.h

@@ -231,8 +231,6 @@ typedef struct _jack_driver
 }
 jack_driver_t;
 
-typedef jack_driver_desc_t * (*JackDriverDescFunction) ();
-
 void jack_driver_init (jack_driver_t *);
 void jack_driver_release (jack_driver_t *);