lint: comply with rules and improve comment

src/sagas/pushNotification.js

@@ -15,7 +15,6 @@ import {
   take,
   takeLatest,
   debounce,
-  delay,
   spawn,
 } from 'redux-saga/effects';
 import messaging from '@react-native-firebase/messaging';
@@ -320,16 +319,17 @@ export function* init() {
   // after its initialization, but only opens the opt-in
   // modal after waller become ready.
   // Spwan creates a detached thread from this current thread.
-  yield spawn(function* handleOptIn(){
+  yield spawn(function* handleOptIn() {
     const { ready } = yield race({
       ready: take(types.WALLET_STATE_READY),
       // Do nothing with error, only terminates the thread.
       error: take(types.WALLET_STATE_ERROR),
     });
 
     if (ready) {
-      // If the user has not been asked yet, we should ask him if he wants to enable push notifications
-      // We should appear only once, so we should save the fact that the user has dismissed the question
+      // Ask user for push notification opt-in if it has not
+      // been asked previously. It appears only once because
+      // we persist the dismiss action on store.
       const optInDismissed = STORE.getItem(pushNotificationKey.optInDismissed);
       if (optInDismissed === null || !optInDismissed) {
         yield put(pushAskOptInQuestion());