How to remove a website from Google search Result

 First need to add Webmaster tool

1. You will need to create an account with Google Webmaster Tools.
2. Log in to your Google Webmaster Tools account.
3. If the account is new, you will have to add your web site.
4 Click the "Add a site" button.
5 Enter your web site URL and click "Continue"

when we change url/web page the old version is still present at google search result

for few days until it crawl the site. you can request google to remove the old content from SERP

1. Copy the  URL you'd like removed from Google's index 
2. Navigate to https://www.google.com/webmasters/tools/removals?
3. Paste in the  URL that you'd like removed.
4. Submit your request.

I dont think its possible to remove third party information on Google only webmaster can remove information in google SERP.