Remove unused variable warning

Author: José Valim

lib/elixir/src/elixir_def_local.erl

@@ -5,7 +5,7 @@
 
 macro_for(_Tuple, _All, #elixir_scope{module=nil}) -> false;
 
-macro_for(Tuple, All, #elixir_scope{module=Module,function=Function} = S) ->
+macro_for(Tuple, All, #elixir_scope{module=Module,function=Function}) ->
   try elixir_def:lookup_definition(Module, Tuple) of
     { { Tuple, Kind, Line, _, _, _, _ }, Clauses } when Kind == defmacro; All, Kind == defmacrop ->
       elixir_tracker:record_local(Tuple, Module, Function),