diff --git a/eth-rpc/server/cryptoutils.nim b/eth-rpc/server/cryptoutils.nim
deleted file mode 100644
index 3d3315c..0000000
--- a/eth-rpc/server/cryptoutils.nim
+++ /dev/null
@@ -1,9 +0,0 @@
-import nimcrypto
-
-proc k256*(data: string): string =
-  # do not convert, assume string is data
-  # REVIEW: Nimcrypto has a one-liner for the code here: sha3_256.digest(data)
-  var k = sha3_256()
-  k.init
-  k.update(cast[ptr uint8](data[0].unsafeaddr), data.len.uint)
-  result = $finish(k)