Revert "feat: add doNotUseFetch helper to the test utils"

Author: galargh

v-next/hardhat-test-utils/src/global.ts

@@ -1,4 +1,3 @@
 export * from "./fixture-projects.js";
-export * from "./fs.js";
-export * from "./global.js";
 export * from "./hardhat-error.js";
+export * from "./fs.js";