patch applied (ghc-6.8/ghc): Remove dead code in TcSimplify

[Ian Lynagh]

Wed Sep  5 20:17:19 PDT 2007  Manuel M T Chakravarty <chak at cse.unsw.edu.au>
  * Remove dead code in TcSimplify

    M ./compiler/typecheck/TcSimplify.lhs -15