Google: Disavow Links Tool. Get the best search news, tips and resources, delivered each day. Google's link disavowal tool allows publishers to tell Google that they don't want certain links from external sites to be considered as part of Google's system of counting links to rank web sites.
Follow the below steps:
Log in to your Google account.
Go to the Disavow Tool.
Select your website.
Click Disavow Button
Choose the file you created.
Click Submit Button