Removing unused mv_ref_stats[] array.

Change-Id: Icd4d495ed32dec215d2157cd8fbebd0648ec5954

vp9/encoder/vp9_onyx_int.h

diff --git a/vp9/encoder/vp9_onyx_int.h b/vp9/encoder/vp9_onyx_int.h
index c4b018a..5de0009 100644
--- a/vp9/encoder/vp9_onyx_int.h
+++ b/vp9/encoder/vp9_onyx_int.h
@@ -676,11 +676,6 @@
   int max_arf_level;
 #endif
 
-#ifdef ENTROPY_STATS
-  int64_t mv_ref_stats[INTER_MODE_CONTEXTS][INTER_MODES - 1][2];
-#endif
-
-
 #ifdef MODE_TEST_HIT_STATS
   // Debug / test stats
   int64_t mode_test_hits[BLOCK_SIZES];