diff --git a/contracts/Marketplace.sol b/contracts/Marketplace.sol
index dc511a9..d2152da 100644
--- a/contracts/Marketplace.sol
+++ b/contracts/Marketplace.sol
@@ -6,11 +6,9 @@ import "@openzeppelin/contracts/utils/math/Math.sol";
 import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
 import "./Collateral.sol";
 import "./Proofs.sol";
-import "./libs/Utils.sol";
 
 contract Marketplace is Collateral, Proofs {
   using EnumerableSet for EnumerableSet.Bytes32Set;
-  using Utils for EnumerableSet.Bytes32Set;
 
   type RequestId is bytes32;
   type SlotId is bytes32;
diff --git a/contracts/libs/Utils.sol b/contracts/libs/Utils.sol
deleted file mode 100644
index 12ed64e..0000000
--- a/contracts/libs/Utils.sol
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.8;
-
-import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
-
-library Utils {
-  using EnumerableSet for EnumerableSet.Bytes32Set;
-
-  function filter(
-    EnumerableSet.Bytes32Set storage set,
-    function(bytes32) internal view returns (bool) include
-  ) internal view returns (bytes32[] memory result) {
-    bytes32[] memory selected = new bytes32[](set.length());
-    uint256 amount = 0;
-
-    for (uint256 i = 0; i < set.length(); i++) {
-      if (include(set.at(i))) {
-        selected[amount++] = set.at(i);
-      }
-    }
-
-    result = new bytes32[](amount);
-    for (uint256 i = 0; i < result.length; i++) {
-      result[i] = selected[i];
-    }
-  }
-}