avfilter/dualinput: remove unused variable

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/dualinput.c

@@ -37,7 +37,6 @@ static int process_frame(FFFrameSync *fs)
         mainpic = s->process(ctx, mainpic, secondpic);
     ret = ff_filter_frame(ctx->outputs[0], mainpic);
     av_assert1(ret != AVERROR(EAGAIN));
-    s->frame_requested = 0;
     return ret;
 }
 

libavfilter/dualinput.h

@@ -33,7 +33,6 @@ typedef struct {
     FFFrameSync fs;
     FFFrameSyncIn second_input; /* must be immediately after fs */
 
-    uint8_t frame_requested;
     AVFrame *(*process)(AVFilterContext *ctx, AVFrame *main, const AVFrame *second);
     int shortest;               ///< terminate stream when the second input terminates
     int repeatlast;             ///< repeat last second frame