avcodec/sipr: Remove write-only AVCodecContext*

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/sipr.c

@@ -532,7 +532,6 @@ static int sipr_decode_frame(AVCodecContext *avctx, AVFrame *frame,
     int subframe_size = ctx->mode == MODE_16k ? L_SUBFR_16k : SUBFR_SIZE;
     int i, ret;
 
-    ctx->avctx = avctx;
     if (avpkt->size < (mode_par->bits_per_frame >> 3)) {
         av_log(avctx, AV_LOG_ERROR,
                "Error processing packet: packet size (%d) too small\n",

libavcodec/sipr.h

@@ -24,7 +24,6 @@
 #ifndef AVCODEC_SIPR_H
 #define AVCODEC_SIPR_H
 
-#include "avcodec.h"
 #include "acelp_pitch_delay.h"
 #include "libavutil/mem_internal.h"
 
@@ -63,8 +62,6 @@ typedef struct SiprParameters {
 } SiprParameters;
 
 typedef struct SiprContext {
-    AVCodecContext *avctx;
-
     SiprMode mode;
 
     float past_pitch_gain;