diff --git a/packages/utils/src/bits.cairo b/packages/utils/src/bits.cairo
deleted file mode 100644
index bfe6c320..00000000
--- a/packages/utils/src/bits.cairo
+++ /dev/null
@@ -1,37 +0,0 @@
-use crate::bit_shifts::shr;
-
-pub fn bit_len(n: u64) -> u64 {
-    let mut x = n | shr(n, 1_u64);
-    x = x | shr(x, 2_u64);
-    x = x | shr(x, 4_u64);
-    x = x | shr(x, 8_u64);
-    x = x | shr(x, 16_u64);
-    x = x | shr(x, 32_u64);
-    x -= shr(x, 1_u64) & 0x5555555555555555_u64;
-    x = (shr(x, 2_u64) & 0x3333333333333333_u64) + (x & 0x3333333333333333_u64);
-    x = (shr(x, 4_u64) + x) & 0x0f0f0f0f0f0f0f0f_u64;
-    x += shr(x, 8_u64);
-    x += shr(x, 16_u64);
-    x += shr(x, 32_u64);
-    x & 0x7f_u64
-}
-
-#[cfg(test)]
-mod tests {
-    use super::bit_len;
-
-    #[test]
-    fn test_bit_len() {
-        assert_eq!(bit_len(0), 0);
-        assert_eq!(bit_len(1), 1);
-        assert_eq!(bit_len(2), 2);
-        assert_eq!(bit_len(3), 2);
-        assert_eq!(bit_len(4), 3);
-        assert_eq!(bit_len(7), 3);
-        assert_eq!(bit_len(8), 4);
-        assert_eq!(bit_len(9), 4);
-        assert_eq!(bit_len(0x4000000000000000), 63);
-        assert_eq!(bit_len(0x8000000000000000), 64);
-        assert_eq!(bit_len(0xffffffffffffffff), 64);
-    }
-}
diff --git a/packages/utils/src/lib.cairo b/packages/utils/src/lib.cairo
index daa5cf0a..d2f2164c 100644
--- a/packages/utils/src/lib.cairo
+++ b/packages/utils/src/lib.cairo
@@ -1,5 +1,4 @@
 pub mod bit_shifts;
-pub mod bits;
 pub mod bytearray;
 pub mod double_sha256;
 pub mod hash;