Remove entropy experiment

It's an obsolete experiment.

Change-Id: I0461b174875b4db0bcf3da643f8b2e97ad2fab51
diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index f56ad7c..5c2bc58 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -123,7 +123,6 @@
 set(CONFIG_MOTION_VAR 0 CACHE BOOL "Internal flag.")
 set(CONFIG_NCOBMC 0 CACHE BOOL "Internal flag.")
 set(CONFIG_WARPED_MOTION 0 CACHE BOOL "Internal flag.")
-set(CONFIG_ENTROPY 0 CACHE BOOL "Internal flag.")
 set(CONFIG_Q_ADAPT_PROBS 0 CACHE BOOL "Internal flag.")
 set(CONFIG_SUBFRAME_PROB_UPDATE 0 CACHE BOOL "Internal flag.")
 set(CONFIG_BITSTREAM_DEBUG 0 CACHE BOOL "Internal flag.")
@@ -165,4 +164,4 @@
 set(CONFIG_FRAME_SUPERRES 0 CACHE BOOL "Internal flag.")
 set(CONFIG_NEW_MULTISYMBOL 0 CACHE BOOL "Internal flag.")
 set(CONFIG_COMPOUND_SINGLEREF 0 CACHE BOOL "Internal flag.")
-set(CONFIG_ANALYZER 0 CACHE BOOL "Internal flag.")
\ No newline at end of file
+set(CONFIG_ANALYZER 0 CACHE BOOL "Internal flag.")
diff --git a/build/cmake/rtcd_config.cmake b/build/cmake/rtcd_config.cmake
index daa9e3a..cdea345 100644
--- a/build/cmake/rtcd_config.cmake
+++ b/build/cmake/rtcd_config.cmake
@@ -60,7 +60,6 @@
 CONFIG_EC_MULTISYMBOL=${RTCD_CONFIG_EC_MULTISYMBOL}
 CONFIG_ENCODERS=${RTCD_CONFIG_ENCODERS}
 CONFIG_ENCODE_PERF_TESTS=${RTCD_CONFIG_ENCODE_PERF_TESTS}
-CONFIG_ENTROPY=${RTCD_CONFIG_ENTROPY}
 CONFIG_ENTROPY_STATS=${RTCD_CONFIG_ENTROPY_STATS}
 CONFIG_ERROR_CONCEALMENT=${RTCD_CONFIG_ERROR_CONCEALMENT}
 CONFIG_EXPERIMENTAL=${RTCD_CONFIG_EXPERIMENTAL}
diff --git a/configure b/configure
index 5bb32d3..83ec996 100755
--- a/configure
+++ b/configure
@@ -279,7 +279,6 @@
     motion_var
     ncobmc
     warped_motion
-    entropy
     q_adapt_probs
     subframe_prob_update
     bitstream_debug