Hard no. There is such a thing as the right to forget. At least in Europe. Stackoverflow likes to take that right away as it earns them more money, but that is never a good reason.
Try publishing a book with any European publisher and then "right to be forgottening" it out of existence.
Specifically since what you've posted on SO you've shared as CC BY-SA.
This only exists as a wish, but is not written in stone and some people actually disagree to that.
Whether it applies to Stack Overflow posts is another discussion. IMO it doesn't due to Creative Commons licensing.
As with almost anything GDPR: it really depends on the content, on the website, on the situation. There's no clear cut answer that applies to all cases.
And copyright law also enters into the picture here, which is why I added the second paragraph.