Temporarily remove Tru64 CXX

[SVN r30735]

status/explicit-failures-markup.xml

@@ -45,7 +45,6 @@
     <mark-toolset name="intel-win32-9_0" status="required"/>
     <mark-toolset name="intel-8.1-linux" status="required"/>
     <mark-toolset name="intel-9.0-linux" status="required"/>
-    <mark-toolset name="tru64cxx65-042" status="required"/>
 
     <!-- /////////////// Libraries /////////////// -->