[perl #122110] [PATCH] Remove left-over mad cruft

The great MADectomy left some cruft behind:

    - no_index in META.{yml,json}
    - $Config{mad} checks in tests
    - Porting/perlhist_calculate.pl
    - symbian/config.pl
    - PERL_XMLDUMP error in perldiag
    - madly{h,obj,src} in win32/config.{gc,vc}