Block: Remove old IP addresses from default autoblock_whitelist message

Block: Remove old IP addresses from default autoblock_whitelist message

These addresses were added way back in r17937 (2006) and I doubt
whether they really need to be there anymore. The addresses in
question appear to still be registered to AOL, but there's a good
chance their addressing infrastructure has changed in the last 9
years.

The page http://webmaster.info.aol.com/proxyinfo.html doesn't exist
anymore, and the AOL website barely mentions proxies:
https://www.google.com/search?q=site:aol.com+proxy

Bug: T110824
Change-Id: Ica2a8dc4251e78271530d4adb1dbe22fa406826a