John Mueller of Google mentioned in a put up on Reddit that disallowing Googlebot to crawl your web site wouldn’t instantly result in the location being deindexed. He added that “it will take fairly a while for the entire web site to drop out,” and the house web page might not be dropped in any respect.
So should you want your web page or pages to be eliminated rapidly, use the site-removal request in Google Search Console.
John wrote, “Even should you disallowed all crawling, it will take fairly a while for the entire web site to drop out, and sure issues just like the homepage would stay listed. What you’ve got posted right here is IMO irrelevant. My guess is you probably did one thing completely unrelated, like submit a site-removal request for http:// (which removes all variations, as documented).”
You may study extra about all of this on this Google assist doc.
Discussion board dialogue at Reddit.