Remove max_depth from RateControlParam

Bug: b/245539956
Change-Id: I5024fbc195e6c6ebc86de3874faf50712244ccdd
diff --git a/av1/ratectrl_qmode_interface.h b/av1/ratectrl_qmode_interface.h
index ab2e4e0..9dbbcbb 100644
--- a/av1/ratectrl_qmode_interface.h
+++ b/av1/ratectrl_qmode_interface.h
@@ -39,9 +39,6 @@
   int ref_frame_table_size;
   // Maximum number of references a single frame may use.
   int max_ref_frames;
-  // Maximum pyramid depth. e.g., 1 means only one ARF per GOP,
-  // 2 would allow an additional level of intermediate ARFs.
-  int max_depth;
 
   int base_q_index;