Remove erroneously checked-in debugging statements.

* cygheap.cc (cygheap_fixup_in_child): Here.
* debug.cc (delete_handle): Here.
* sigproc.cc (child_info_spawn::cleanup): Here.
* spawn.cc (child_info_spawn::worker): Here.

winsup/cygwin/spawn.cc

@@ -849,7 +849,6 @@ loop:
     }
 
 out:
-debug_printf ("about to call cleanup");
   this->cleanup ();
   if (envblock)
     free (envblock);