Hi Seth,
You can just ignore this warning by clicking Okay, if your apps is working correctly. Facebook just telling you that some of the permission need to be approved by Facebook before it can be used.
However if you still insisted to avoid such warning, you can submit the apps for review.
To fix this, you need to send submit item for approval in your Facebook Apps.
1. Go to your Facebook Apps and edit it. Navigate yourself to Status & Review section from the left sidebar and Click the Start a Submission button.
2. Select publish_actions permission and click Add Items button.
3. Complete the required items listed.
4. Complete "App Details" the required items listed.
5. After you done the "App detail", then go back to "Status & Review" and click "Add Notes" button.
6. Provide the required information and click Save button.
7. Provide step-by-step how to access Facebook login
8. Upload the screen-shots regarding how you will use Facebook in your app.
9. Tick that checkbox and Click Submit for Review button at the bottom-right corner.
10. Accept the terms and conditions and click Submit button.
11. You will get the notification - “On average, submissions will be reviewed within 7 business days.” Click OK.
12. You will get App permission approval notification.
Hope this helps and please update us back on this issue.
Thanks.