build: Remove unused variables

libdbus isn't localized, so we have no use for libintl. We always
link libdbus-1 with -no-undefined, so we have no use for
putting that flag in no_undefined on Windows only. export_symbols
seems to be left over from before fd.o#83115 was fixed.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=103015Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>

dbus/Makefile.am

@@ -55,17 +55,10 @@ dbus_res = versioninfo.o
 EXTRA_libdbus_1_la_DEPENDENCIES = $(dbus_res)
 dbus_res_ldflag = -Wl,$(dbus_res)
 
-no_undefined = -no-undefined
-export_symbols =
-
-intllibs =
-
 else
+
 dbus_res =
 dbus_res_ldflag =
-no_undefined =
-
-intllibs = @LTLIBINTL@
 
 endif