Remove unused b_playlist_locked

src/control/core.c

@@ -138,7 +138,6 @@ libvlc_instance_t * libvlc_new( int argc, const char *const *argv,
     p_new->libvlc_vlm.p_vlm = NULL;
     p_new->libvlc_vlm.p_event_manager = NULL;
     p_new->libvlc_vlm.pf_release = NULL;
-    p_new->b_playlist_locked = 0;
     p_new->ref_count = 1;
     p_new->verbosity = 1;
     p_new->p_callback_list = NULL;

src/control/libvlc_internal.h

@@ -70,7 +70,6 @@ struct libvlc_instance_t
 {
     libvlc_int_t *p_libvlc_int;
     libvlc_vlm_t  libvlc_vlm;
-    int           b_playlist_locked;
     unsigned      ref_count;
     int           verbosity;
     vlc_mutex_t   instance_lock;