audio/xmms-nas: Remove unnecessary patch

At one point DragonFly needs a patched ltconfig to build this port, but
libtool was recently updated to apply changes for DF automatically, so
the ltconfig patch is redundant.

Noticed by:	tijl

audio/xmms-nas/files/patch-ltconfig

@@ -1,20 +0,0 @@
---- ltconfig.orig	1999-08-06 23:43:29.000000000 +0000
-+++ ltconfig
-@@ -1216,7 +1216,7 @@ else
-     ;;
- 
-   # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
--  freebsd*)
-+  dragonfly*|freebsd*)
-     archive_cmds='$CC -shared -o $lib $libobjs $deplibs $linkopts'
-     hardcode_libdir_flag_spec='-R$libdir'
-     hardcode_direct=yes
-@@ -1665,7 +1665,7 @@ freebsd1*)
-   dynamic_linker=no
-   ;;
-   
--freebsd*)
-+dragonfly*|freebsd*)
-   objformat=`test -x /usr/bin/objformat && /usr/bin/objformat || echo aout`
-   version_type=freebsd-$objformat
-   case "$version_type" in