fix: remove coverage and coverageJson from user config

hardhat.config.ts

@@ -64,8 +64,6 @@ const config: HardhatUserConfig = {
   paths: {
     artifacts: "./artifacts",
     cache: "./cache",
-    coverage: "./coverage",
-    coverageJson: "./coverage.json",
     sources: "./contracts",
     tests: "./test",
   },

types/augmentations.d.ts

@@ -1,13 +1,6 @@
 import { Accounts, Signers } from "./";
 import { Greeter } from "../typechain/Greeter";
 
-declare module "hardhat/types" {
-  interface ProjectPathsUserConfig {
-    coverage: string;
-    coverageJson: string;
-  }
-}
-
 declare module "mocha" {
   export interface Context {
     accounts: Accounts;