If you were using Shared storage like SAN or a network share then this wouldn't have been a problem
We have used a utility called "Allwaysync"
http://allwaysync.com/You can setup a sync job on your webserver 2, to sync from webserver-1
It has quite a few features, support is nice and they respond, you can setup sync jobs in a way that it will either delete the files which are not on webserver-1 and are on webserver-2 or it can move deleted files to a specified folder, same with modifications.
give it a go on a test box and it should be useful in your situation.
Hope that helps