Remove wikimania2005 whitelist from InitialiseSettings.php

I can access e.g. http://wikimania2005.wikimedia.org/wiki/Broadcasting despite
it not being on the whitelist, so obviously wgWhitelistRead is having no effect
for this wiki.

Since the content is obsolete, I don't think there is any point trying to fix
this wiki. This commit just removes the long whitelist from InitialiseSettings.

Bug: 53909
Change-Id: I1859d47b3aca60df3c6276bf80a8fb47469a09a4