We just relaunched our website and I need to remove all of old links from googles index. I did a
site:ourdomain.com search but I don't really feel like copying and pasting all of the links that way.
Is there an easier way?
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Do a 301 redirect from any old URLs that have a corresponding URL in the relaunched website. This will allow Google, and your users, to find and associate the old pages with the new. This is important for SEO as it carries over any links you have pointing to the old URLs.
Serve a 404 error for any pages that no longer exist and do not have a corresponding URL in the relaunched website. This will tell Google those pages are gone and to remove them from their index.
Make a 404 page that tells users your site has been redesigned and try to point them towards the new pages. At the very least point to a sitemap and where they can ask for help.
It's just a matter of time, when the google crawler decides to visit your new site. And maybe creating a sitemap for google would speed up the task. I think this link could help you too:
I believe this Google page has the answer(s) you're looking for.