Tests: removed TODO and try_run() checks for legacy versions. For h2_http2.t, try_run() is preserved to ensure that deprecation warnings for "listen ... http2" are suppressed, yet plan() is reported before try_run(), so failure to start will be properly reported.

--- a/dav_utf8.t
+++ b/dav_utf8.t
@@ -57,8 +57,6 @@ EOF
 
 ###############################################################################
 
-local $TODO = 'not yet' if $^O eq 'MSWin32' and !$t->has_version('1.23.4');
-
 my $d = $t->testdir();
 my $r;