remove useless LclDecContext.avctx field

Originally committed as revision 9615 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/lcldec.c

@@ -53,8 +53,6 @@
  * Decoder context
  */
 typedef struct LclDecContext {
-
-        AVCodecContext *avctx;
         AVFrame pic;
 
     // Image type
@@ -524,8 +522,6 @@ static int decode_init(AVCodecContext *avctx)
     unsigned int max_decomp_size;
     int zret; // Zlib return code
 
-    c->avctx = avctx;
-
     c->pic.data[0] = NULL;
 
 #ifdef CONFIG_ZLIB