1 files changed, 0 insertions, 9 deletions
diff --git a/perl.h b/perl.h
index 88786e1fe0..cf35ded555 100644
--- a/perl.h
+++ b/perl.h
@@ -48,15 +48,6 @@
  * repeated in makedef.pl, so be certain to update
  * both places when editing. */
 
-#ifdef PERL_IMPLICIT_SYS
-/* PERL_IMPLICIT_SYS implies PerlMemShared != PerlMem
-   so use slab allocator to avoid lots of MUTEX overhead
- */
-#  ifndef PL_OP_SLAB_ALLOC
-#    define PL_OP_SLAB_ALLOC
-#  endif
-#endif
-
 #ifdef USE_ITHREADS
 #  if !defined(MULTIPLICITY)
 #    define MULTIPLICITY