svl: Drop dead constants

which were gone at b021353d
and 75933b22.

Change-Id: Ibfff9a4b0c5f834c1daaedeeff8e48d8eb923cb3
Reviewed-on: https://gerrit.libreoffice.org/43308Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

svl/source/inc/poolio.hxx

@@ -34,8 +34,6 @@ class SfxItemPoolUser;
 #define DELETEZ(pPtr) { delete pPtr; pPtr = 0; }
 #endif
 
-static const sal_uInt32 SFX_ITEMS_DIRECT  = 0xffffffff;
-static const sal_uInt32 SFX_ITEMS_NULL    = 0xfffffff0;  // instead StoreSurrogate
 static const sal_uInt32 SFX_ITEMS_DEFAULT = 0xfffffffe;
 
 /**