Remove the deprecated -tdf option

It's been marked as deprecated since a very long time already, and
the parameter is not doing anything useful anymore except for printing
a warning, so it's now time to finally get rid of this option.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1519071820-4062-1-git-send-email-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

vl.c

@@ -3842,9 +3842,6 @@ int main(int argc, char **argv, char **envp)
                     exit(1);
                 }
                 break;
-            case QEMU_OPTION_tdf:
-                warn_report("ignoring deprecated option");
-                break;
             case QEMU_OPTION_name:
                 opts = qemu_opts_parse_noisily(qemu_find_opts("name"),
                                                optarg, true);