Remove obsolete hack about now non-existing perl5-base package.

doc/HACKS

@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.32 2009/10/11 16:14:39 asau Exp $
+# $NetBSD: HACKS,v 1.33 2011/08/01 11:59:47 asau Exp $
 #
 # This file is intended to document workarounds for currently unsolved
 # (mostly) compiler bugs.
@@ -159,23 +159,6 @@ descr
 	toolchain.
 kcah
 
-hack	perl5-base
-mdate	12 Apr 2001
-who	manu
-port	all
-Checking in perl5-base/patches/patch-ag: 1.2 : 1 : 999
-descr
-	The Xerces-Perl module is implemented as a shared object. It needs
-	some symbols from libgcc.a, such as __eh_alloc. It's not possible
-	to link the xerces-P shared object with libgcc.a, because libgcc.a
-	is not compiled with -fPIC. Hence we need to have the missing
-	symbols in the Perl executable.
-	This hack includes the whole libgcc.a in the Perl executable, and
-	links with c++ so that some mandatory symbols such as __pure_virtual
-	are also included. It should go away with GCC-3.0, or if we make a
-	libgcc.so on day.
-kcah
-
 hack	gcc-2.95.3 -O* bug
 mdate	12 Feb 2002
 who	mrauch