cc: Remove unused scheduler setting.

cc/trees/layer_tree_settings.h

Index: cc/trees/layer_tree_settings.h
diff --git a/cc/trees/layer_tree_settings.h b/cc/trees/layer_tree_settings.h
index f369343cceca7cfe28db066f5b209b005241cef6..88c7002fd502a58cd8c5d6aa3cb499800bc26230 100644
--- a/cc/trees/layer_tree_settings.h
+++ b/cc/trees/layer_tree_settings.h
@@ -89,7 +89,6 @@ class CC_EXPORT LayerTreeSettings {
   bool use_occlusion_for_tile_prioritization = false;
   bool verify_clip_tree_calculations = false;
   bool image_decode_tasks_enabled = false;
-  bool abort_commit_before_compositor_frame_sink_creation = true;
   bool use_layer_lists = false;
   int max_staging_buffer_usage_in_bytes = 32 * 1024 * 1024;
   ManagedMemoryPolicy gpu_memory_policy;