diff --git a/packages/hardhat-core/src/internal/core/config/config-validation.ts b/packages/hardhat-core/src/internal/core/config/config-validation.ts
index f8fa00767b..b14ca59428 100644
--- a/packages/hardhat-core/src/internal/core/config/config-validation.ts
+++ b/packages/hardhat-core/src/internal/core/config/config-validation.ts
@@ -2,11 +2,6 @@ import * as t from "io-ts";
 import { Context, getFunctionName, ValidationError } from "io-ts/lib";
 import { Reporter } from "io-ts/lib/Reporter";
 
-import {
-  HardhatConfig,
-  HardhatNetworkAccountsUserConfig,
-  HardhatNetworkAccountUserConfig,
-} from "../../../types";
 import {
   HARDHAT_NETWORK_NAME,
   HARDHAT_NETWORK_SUPPORTED_HARDFORKS,