I removed the breaking changes that were older than a month. I don't plan on cutting new releases for this in the future, but for this first time I'm doing it to help communicate that it is happening. As mentioned on the README I will be removing breaking changes older than a month as I want this to be a list of upcoming or recent breaking changes.
Older changes have been moved to https://github.com/SummitRoute/aws_breaking_changes/blob/master/archive.md