Fix eslint no unused vars rule

.eslintrc.json

@@ -20,6 +20,8 @@
         "@typescript-eslint"
     ],
     "rules": {
-        "semi": [2, "always"]
+        "semi": [2, "always"],
+        "no-unused-vars": "off",
+        "@typescript-eslint/no-unused-vars": "error"
     }
 }