This is what the email looks like. If you get it, don't open the attached file. The "to" recipient is typically email@example.com
Once logged into your account, click on your picture or initials, then select "My Account"
Under "Sign-In and Security" choose "Connected Apps and Sites"
Then choose "Manage Apps"
Find the app called "Google Docs" and click it. Then select "Remove" This example shows the app "Doctopus" but "Doctopus" is safe.