Remove unused color_sensitivity member from MACROBLOCK.

Change-Id: I95fe4401291a90520f9c76e673fa0eff5f71047d

av1/encoder/block.h

@@ -152,10 +152,6 @@ struct macroblock {
 
   // Used to store sub partition's choices.
   MV pred_mv[MAX_REF_FRAMES];
-
-  // Strong color activity detection. Used in RTC coding mode to enhance
-  // the visual quality at the boundary of moving color objects.
-  uint8_t color_sensitivity[2];
 };
 
 #ifdef __cplusplus

av1/encoder/encodeframe.c

@@ -657,7 +657,6 @@ static int choose_partitioning(AV1_COMP *cpi, const TileInfo *const tile,
 
   if (!is_key_frame) {
     MB_MODE_INFO *mbmi = &xd->mi[0]->mbmi;
-    unsigned int uv_sad;
     const YV12_BUFFER_CONFIG *yv12 = get_ref_frame_buffer(cpi, LAST_FRAME);
 
     const YV12_BUFFER_CONFIG *yv12_g = NULL;
@@ -699,20 +698,6 @@ static int choose_partitioning(AV1_COMP *cpi, const TileInfo *const tile,
 
     av1_build_inter_predictors_sb(xd, mi_row, mi_col, BLOCK_64X64);
 
-    for (i = 1; i <= 2; ++i) {
-      struct macroblock_plane *p = &x->plane[i];
-      struct macroblockd_plane *pd = &xd->plane[i];
-      const BLOCK_SIZE bs = get_plane_block_size(bsize, pd);
-
-      if (bs == BLOCK_INVALID)
-        uv_sad = UINT_MAX;
-      else
-        uv_sad = cpi->fn_ptr[bs].sdf(p->src.buf, p->src.stride, pd->dst.buf,
-                                     pd->dst.stride);
-
-      x->color_sensitivity[i - 1] = uv_sad > (y_sad >> 2);
-    }
-
     d = xd->plane[0].dst.buf;
     dp = xd->plane[0].dst.stride;