Removing tx_stepdown_count from VP9_COMP.

The variable is never read.

Change-Id: I94141c1667fa5d10604cd6f83c5f64df107dee94

vp9/encoder/vp9_encodeframe.c

@@ -3289,7 +3289,6 @@ static void encode_frame_internal(VP9_COMP *cpi) {
 
   vp9_zero(cm->counts);
   vp9_zero(cpi->coef_counts);
-  vp9_zero(cpi->tx_stepdown_count);
   vp9_zero(rd_opt->comp_pred_diff);
   vp9_zero(rd_opt->filter_diff);
   vp9_zero(rd_opt->tx_select_diff);

vp9/encoder/vp9_encoder.h

@@ -372,8 +372,6 @@ typedef struct VP9_COMP {
 
   int dummy_packing;    /* flag to indicate if packing is dummy */
 
-  unsigned int tx_stepdown_count[TX_SIZES];
-
   int initial_width;
   int initial_height;
 

vp9/encoder/vp9_rdopt.c

@@ -468,7 +468,6 @@ static void choose_largest_tx_size(VP9_COMP *cpi, MACROBLOCK *x,
   txfm_rd_in_plane(x, rate, distortion, skip,
                    sse, ref_best_rd, 0, bs,
                    mbmi->tx_size, cpi->sf.use_fast_coef_costing);
-  cpi->tx_stepdown_count[0]++;
 }
 
 static void choose_tx_size_from_rd(VP9_COMP *cpi, MACROBLOCK *x,
@@ -551,16 +550,12 @@ static void choose_tx_size_from_rd(VP9_COMP *cpi, MACROBLOCK *x,
 
   if (max_tx_size == TX_32X32 && best_tx == TX_32X32) {
     tx_cache[TX_MODE_SELECT] = rd[TX_32X32][1];
-    cpi->tx_stepdown_count[0]++;
   } else if (max_tx_size >= TX_16X16 && best_tx == TX_16X16) {
     tx_cache[TX_MODE_SELECT] = rd[TX_16X16][1];
-    cpi->tx_stepdown_count[max_tx_size - TX_16X16]++;
   } else if (rd[TX_8X8][1] < rd[TX_4X4][1]) {
     tx_cache[TX_MODE_SELECT] = rd[TX_8X8][1];
-    cpi->tx_stepdown_count[max_tx_size - TX_8X8]++;
   } else {
     tx_cache[TX_MODE_SELECT] = rd[TX_4X4][1];
-    cpi->tx_stepdown_count[max_tx_size - TX_4X4]++;
   }
 }