bug 4802: remove the sanitize function copied from the DK plugin, it's not needed with DKIM
bug 4802: remove the sanitize function copied from the DK plugin, it's not needed with DKIM

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@388651 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin