This is a follow up question from here: Duplicate title tags due to translations
Since asking the question I have removed the duplicated content that was being generated by language/translations on the website in question.
In the answer I was told that I should return 410 errors for the removed duplicate pages, use robots.txt to disallow crawling of duplicate pages, and to use the Fetch as Google feature to re-trigger crawling.
My question is now that I've actually removed the pages (I've removed all of the translation options), will this self-correct when Google next crawls the site and notices that the links are gone? Do I still need to do the things recommended, given that the duplicated content is now gone?