Remove redundant arf_r0 from cpi->rd

Change-Id: I76dedda52b252141011adda45cddfc5e0fe881c8
diff --git a/av1/encoder/rd.h b/av1/encoder/rd.h
index 1310561..6227981 100644
--- a/av1/encoder/rd.h
+++ b/av1/encoder/rd.h
@@ -78,7 +78,7 @@
 
   int RDMULT;
 
-  double r0, arf_r0;
+  double r0;
   double mc_saved_base, mc_count_base;
 } RD_OPT;