diff --git a/contracts/validator/contract/interfaces/IValidator.sol b/contracts/validator/contract/interfaces/IValidator.sol
deleted file mode 100644
index 5f2c00061a..0000000000
--- a/contracts/validator/contract/interfaces/IValidator.sol
+++ /dev/null
@@ -1,6 +0,0 @@
-pragma solidity ^0.4.21;
-
-interface IValidator {
-    function propose(address, string) external payable;
-    function vote(address) external payable;
-}