How to Remove Default Footer Credits ?

What theme are you using? Can you post a link to your site with the child theme active?

Right now using Twenty Sixteen theme. Child theme is currently active www.ashishdungdung.com

The site you linked doesn’t appear to be using the Twenty Sixteen theme; it looks like it’s using the Sydney theme.

If you’re still planning on using the Sydney theme, you could hide the credits with this CSS:

.site-info {
  display: none;
}

Since you appear to be using a caching plugin, you’ll likely have to temporarily disable the plugin and flush the cache before you’ll see any changes.

Pardon me. Its https://www.androidemulator.in

Fortunately, you can use the same CSS:

.site-info {
  display: none;
}

And to keep the social media icons positioned on the right:

.site-footer .social-navigation {
  margin-left: auto;
}

Since you appear to be using a caching plugin on this site as well, you’ll likely have to temporarily disable the plugin and flush the cache before you’ll see any changes.

Thanks for your help! Really appreciate it.