Following the announcement of Google+ API deprecation scheduled for March 2019, a number of changes will be made to Blogger’s Google+ integration on 4 February 2019.
Google+ widgets: Support for the “+1 Button”, “Google+ Followers” and “Google+ Badge” widgets in Layout will no longer be available.
+1 buttons: The +1/G+ buttons and Google+ share links below blog posts and in the navigation bar will be removed.
Google+ Comments: Support for Google+ comments will be turned down, and all blogs using Google+ comments will be reverted back to using Blogger comments. Unfortunately, comments posted as Google+ comments cannot be migrated to Blogger and will no longer appear on your blog.
Basically the Google+ options are going to be removed soon and if you've commented previously through Google+ instead of directly on the blog, those will go away too. So if you see a few items disappear today, you now know why!
Speaking of Blogger updates, what do you think of the new look? Streamlined, right? I'm still working on the text/banner, but I like where this style is going. If you have suggestions, pop them in the comments!