Report: Delta to Slash Fares  NEW YORK (Reuters) - Delta Air Lines Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt;, the No.  3 U.S. carrier which has been restructuring in efforts to avoid  a bankruptcy filing, is expected to slash fares and remove  restrictive rules such as Saturday-night stays, Time magazine  reported in its online edition on Sunday.