Delete the AIX5 port.  The last release this worked for is 3.4.1,
and then only on AIX 5.2 and 5.3.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11842 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/include/pub_tool_basics_asm.h b/include/pub_tool_basics_asm.h
index 84582af..57a9d2d 100644
--- a/include/pub_tool_basics_asm.h
+++ b/include/pub_tool_basics_asm.h
@@ -48,7 +48,7 @@
 
 #define VGAPPEND(str1,str2) str1##str2
  
-#if defined(VGO_linux) || defined(VGO_aix5)
+#if defined(VGO_linux)
 #  define VG_(str)    VGAPPEND( vgPlain_,          str)
 #  define ML_(str)    VGAPPEND( vgModuleLocal_,    str)
 #elif defined(VGO_darwin)