diff --git a/circuit/misc.circom b/circuit/misc.circom
index c120261..286f924 100644
--- a/circuit/misc.circom
+++ b/circuit/misc.circom
@@ -1,16 +1,5 @@
 pragma circom 2.0.0;
 
-//------------------------------------------------------------------------------
-// compute (compile time) the log2 of a number
-
-function FloorLog2(n) {
-  return (n==0) ? -1 : (1 + FloorLog2(n>>1));
-}
-
-function CeilLog2(n) {
-  return (n==0) ? 0 : (1 + FloorLog2(n-1));
-}
-
 //------------------------------------------------------------------------------
 // decompose an n-bit number into bits