chore: turn off mocha/handle-done-callback rule as a workaround

The mocha plugin incorretly reports the following signature as a
violation of `mocha/handle-done-callback` (misinterpreting `this`
as `done`).

```ts
before(async function setupApplication(this: Mocha.Context) {
  this.timeout(6000);
  // ...
});
```

See lo1tuma/eslint-plugin-mocha#270

Signed-off-by: Raymond Feng <[email protected]>

.eslintrc.js

@@ -17,6 +17,8 @@ module.exports = {
          * The mocha plugin reports the following signature as a violation of
          * `mocha/handle-done-callback` (misinterpreting `this` as `done`).
          *
+         * See https://github.com/lo1tuma/eslint-plugin-mocha/issues/270
+         *
          * ```ts
          * before(async function setupApplication(this: Mocha.Context) {
          *   this.timeout(6000);

packages/eslint-config/eslintrc.js

@@ -255,23 +255,6 @@ module.exports = {
         '@typescript-eslint/prefer-nullish-coalescing': 'off',
       },
     },
-    {
-      files: ['**/*.ts'],
-      rules: {
-        /*
-         * The mocha plugin reports the following signature as a violation of
-         * `mocha/handle-done-callback`.
-         *
-         * ```ts
-         * before(async function setupApplication(this: Mocha.Context) {
-         *   this.timeout(6000);
-         *   // ...
-         * }
-         * ```
-         */
-        'mocha/handle-done-callback': 'off',
-      },
-    },
   ],
 };