I would venture to suggest it isn't the EU privacy law that is causing her removal, more a knee-jerk reaction to it. The removal of the queen is completely ridiculous. She accepted, when she took the public role of queen, that her lineage would be subject to public scrutiny and therefore comes under the exception category. Her profile contains previously published facts that could be argued to be in the public interest. You can bet that Wikipedia will not be removing it's page on the queen and those of her relatives, because it cites previously published material as the basis for her page. Erasing articles in the public interest should not be blamed on GDPR, but on people misunderstanding the way it should be applied, or using a blanket, sledgehammer approach to complying.