fix: empty cache dir before deleting it

Author: galargh

v-next/hardhat/test/internal/builtin-plugins/console/task-action.ts

@@ -145,6 +145,9 @@ describe("console/task-action", function () {
     });
 
     afterEach(function () {
+      if (fs.existsSync(history)) {
+        fs.rmSync(history, { force: true });
+      }
       fs.rmSync(cacheDir, { recursive: true, force: true });
     });