Thank you for the review @lexsoft.
I have fixed the issues from PAReview.sh. ...

Thank you for the review @lexsoft.

I have fixed the issues from PAReview.sh. Below is the link to the updated revision.
https://pareview.sh/pareview/https-git.drupal.org-project-image_approval.git-7.x-1.x/revisions/6333/view

As suggested I have also added a description in module page stating it only works for the moderation of user profile picture.
https://www.drupal.org/project/image_approval#synopsis