[petsc-dev] get rid of petscsys.hh?

[Barry Smith]

    Can we get rid of petscsys.hh which still? seems to be lurking in master?

   Thanks

   Barry

/* Special support for C++ */
#if defined(PETSC_CLANGUAGE_CXX) && defined(__cplusplus)
#include <petscsys.hh>
#endif