Enable quality boost for internal ARFs

Also remove some unused MACRO constants

Change-Id: Id2d296922a2b9bb53437f644ee329b43837497fa
diff --git a/av1/encoder/ratectrl.c b/av1/encoder/ratectrl.c
index 5e6536f..8fa6b7b 100644
--- a/av1/encoder/ratectrl.c
+++ b/av1/encoder/ratectrl.c
@@ -930,11 +930,8 @@
   ASSIGN_MINQ_TABLE(cm->bit_depth, inter_minq);
 
 #if CUSTOMIZED_GF
-  int is_intrl_arf_boost =
+  const int is_intrl_arf_boost =
       gf_group->update_type[gf_group->index] == INTNL_ARF_UPDATE;
-#if MATCH_OLD_BITRATE
-  if (cpi->new_bwdref_update_rule == 1) is_intrl_arf_boost = 0;
-#endif
 #else
   const int is_intrl_arf_boost = cpi->refresh_alt2_ref_frame;
 #endif  // CUSTOMIZED_GF