qemu-options: Remove remainders of the -tdf option

The -tdf options has been removed with d07aa197,
but apparently I forgot to remove the corresponding two lines from
qemu-options.hx, so this option is still "available" and just silently
ignored. Kill it now for good.
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1525453270-23074-2-git-send-email-thuth@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

qemu-options.hx

@@ -3921,9 +3921,6 @@ DEF("no-kvm-pit-reinjection", 0, QEMU_OPTION_no_kvm_pit_reinjection,
 HXCOMM Deprecated by -machine kernel_irqchip=on|off property
 DEF("no-kvm-irqchip", 0, QEMU_OPTION_no_kvm_irqchip, "", QEMU_ARCH_I386)
 
-HXCOMM Deprecated (ignored)
-DEF("tdf", 0, QEMU_OPTION_tdf,"", QEMU_ARCH_ALL)
-
 DEF("msg", HAS_ARG, QEMU_OPTION_msg,
     "-msg timestamp[=on|off]\n"
     "                change the format of messages\n"