diff --git a/src/learn/learn.h b/src/learn/learn.h
index 6056e8c6..ea622bce 100644
--- a/src/learn/learn.h
+++ b/src/learn/learn.h
@@ -23,15 +23,6 @@ typedef float LearnFloatType;
 //#include "half_float.h"
 //typedef HalfFloat::float16 LearnFloatType;
 
-// ----------------------
-// save memory
-// ----------------------
-
-// Use a triangular array for the Weight array (of which is KPP) to save memory.
-// If this is used, the weight array for learning will be about 3 times as large as the evaluation function file.
-
-#define USE_TRIANGLE_WEIGHT_ARRAY
-
 // ----------------------
 // dimension down
 // ----------------------