Address lint issues

Author: greyivy

injected/integration-test/duck-ai-data-clearing.spec.js

@@ -81,7 +81,6 @@ test('duck-ai-data-clearing feature handles localStorage errors gracefully', asy
 
     // Mock localStorage to throw an error
     await page.evaluate(() => {
-        const originalRemoveItem = Storage.prototype.removeItem;
         Storage.prototype.removeItem = () => {
             throw new Error('Simulated localStorage error');
         };

injected/src/features/duck-ai-data-clearing.js

@@ -8,6 +8,7 @@ import ContentFeature from '../content-feature.js';
  */
 export class DuckAiDataClearing extends ContentFeature {
     init() {
+        // eslint-ignore-next-line require-await
         this.messaging.subscribe('duckAiClearData', _ => this.clearData());
     }