Remove last instances of FORWARD/BACKWARD state.

I seem to have missed these, sorry guys for breaking the build.

src/control/media_list_player.c

@@ -376,7 +376,6 @@ libvlc_media_list_player_is_playing( libvlc_media_list_player_t * p_mlp,
 {
     libvlc_state_t state = libvlc_media_player_get_state( p_mlp->p_mi, p_e );
     return (state == libvlc_Opening) || (state == libvlc_Buffering) ||
-           (state == libvlc_Forward) || (state == libvlc_Backward) ||
            (state == libvlc_Playing);
 }
 

src/control/mediacontrol_core.c

@@ -380,12 +380,6 @@ mediacontrol_get_stream_information( mediacontrol_Instance *self,
         case libvlc_Stopped:
             retval->streamstatus = mediacontrol_StopStatus;
             break;
-        case libvlc_Forward:
-            retval->streamstatus = mediacontrol_ForwardStatus;
-            break;
-        case libvlc_Backward:
-            retval->streamstatus = mediacontrol_BackwardStatus;
-            break;
         case libvlc_Ended:
             retval->streamstatus = mediacontrol_EndStatus;
             break;