Clean up dead code

Change-Id: I6da2d4ef99301a43baa315db02aa11e890efbecc

aom_dsp/prob.h

diff --git a/aom_dsp/prob.h b/aom_dsp/prob.h
index 999fb74..c99db21 100644
--- a/aom_dsp/prob.h
+++ b/aom_dsp/prob.h
@@ -632,10 +632,6 @@
 
 #endif
 
-#define MAX_PROB 255
-
-#define BR_NODE 1
-
 static INLINE uint8_t get_prob(unsigned int num, unsigned int den) {
   assert(den != 0);
   {

av1/encoder/cost.c

diff --git a/av1/encoder/cost.c b/av1/encoder/cost.c
index 668023c..323e2ae 100644
--- a/av1/encoder/cost.c
+++ b/av1/encoder/cost.c
@@ -33,9 +33,6 @@
   for (i = 0;; ++i) {
     aom_cdf_prob p15 = AOM_ICDF(cdf[i]) - prev_cdf;
     p15 = (p15 < EC_MIN_PROB) ? EC_MIN_PROB : p15;
-    // p15 = (p15 < CDF_PROB_TOP - EC_MIN_PROB) ? p15 : CDF_PROB_TOP -
-    // EC_MIN_PROB;
-    // prev_cdf += p15;
     prev_cdf = AOM_ICDF(cdf[i]);
 
     if (inv_map)