Per r24062, this should also be removed.

This commit was SVN r24064.

The following SVN revision numbers were found above:
  r24062 --> open-mpi/ompi@3b0caf7dea

opal/mca/event/libevent207/libevent/WIN32-Code/event2/event-config.h

@@ -350,9 +350,4 @@
 /* Define to `int' if <sys/types.h> does not define. */
 #define _EVENT_ssize_t SSIZE_T
 
-#ifdef WIN32
-/* need the bool definition */
-#include "opal_config.h"
-#endif
-
 #endif