diff --git a/bridge/util/common.go b/bridge/util/common.go
index e100d3d4..05202624 100644
--- a/bridge/util/common.go
+++ b/bridge/util/common.go
@@ -668,12 +668,3 @@ func LogElapsedTimeForStateSyncedEvent(event interface{}, functionName string, s
 		"stateSyncId", typedEvent.Id,
 		"timeElapsed", timeElapsed)
 }
-
-// IsPubKeyFirstByteValid checks the validity of the first byte of the public key.
-// It must be 0x04 for uncompressed public keys
-func IsPubKeyFirstByteValid(pubKey []byte) bool {
-	prefix := make([]byte, 1)
-	prefix[0] = byte(0x04)
-
-	return bytes.Equal(prefix, pubKey[0:1])
-}