Remove additional INSTALLDIRS from Makefile.PL

Module-CoreList Makefile.PL had two INSTALLDIRS

Removed the one introduced by commit 262731e

Should address issue #23562

Author: bingos

dist/Module-CoreList/Makefile.PL

@@ -26,7 +26,6 @@ WriteMakefile
         'version' => 0.88,
     },
     'EXE_FILES' => [ _scripts() ],
-    'INSTALLDIRS' => ($] < 5.011 ? 'perl' : 'site'),
     'PL_FILES' => {},
     LICENSE => 'perl',
     @extra,