There is a tag called a lifecycle tag.  

https://wiki.openstreetmap.org/wiki/Lifecycle_prefix

We usually add these tags buildings that are demolished but still appear in the latest aerials.  Then after the aerials are updated (or possibly the construction is finished), we delete it.

The tag will removes it from the rendered map, but it keeps it in the editor.  It mainly prevents people from accidentally readding the buildings from aerials.

...but since I'm the only person who would likely be readding it, don't worry about it this time.  I'll add a construction area around it next time I drive down it to remind me and others.