Remove CONFIG_DEPENDENT_HORZTILEGROUPS

This tool is removed.

Change-Id: Ic5913a2fd53c07cb7bf9b3da35ea4d6495d25de3

av1/common/tile_common.c

diff --git a/av1/common/tile_common.c b/av1/common/tile_common.c
index 1826663..6c0551f 100644
--- a/av1/common/tile_common.c
+++ b/av1/common/tile_common.c
@@ -17,19 +17,10 @@
 #if CONFIG_DEPENDENT_HORZTILES
 void av1_tile_set_tg_boundary(TileInfo *tile, const AV1_COMMON *const cm,
                               int row, int col) {
-#if CONFIG_DEPENDENT_HORZTILEGROUPS
-  (void)cm;
-  (void)col;
-#if !CONFIG_MAX_TILE
-  (void)row;
-#endif
-  tile->tg_horz_boundary = (row == 0);
-#else
   const int tg_start_row = cm->tile_group_start_row[row][col];
   const int tg_start_col = cm->tile_group_start_col[row][col];
   tile->tg_horz_boundary = ((row == tg_start_row && col >= tg_start_col) ||
                             (row == tg_start_row + 1 && col < tg_start_col));
-#endif
 #if CONFIG_MAX_TILE
   if (cm->tile_row_independent[row]) {
     tile->tg_horz_boundary = 1;  // this tile row is independent

build/cmake/aom_config_defaults.cmake

diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index 6fae845..faf6a2c 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -90,7 +90,6 @@
 set(CONFIG_AMVR 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_AOM_QM_EXT 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_CDF_UPDATE_MODE 1 CACHE NUMBER "AV1 experiment flag.")
-set(CONFIG_DEPENDENT_HORZTILEGROUPS 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DEPENDENT_HORZTILES 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_DIST_8X8 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_ENTROPY_STATS 0 CACHE NUMBER "AV1 experiment flag.")