MAINTAINERS: Remove myself from the Meson section

The Meson section has plenty of reviewers, and in order to reduce the
load on my Inbox a little bit, I'm stepping back as a reviewer here.

Message-ID: <20240906155900.742157-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

MAINTAINERS

@@ -4212,7 +4212,6 @@ Meson
 M: Paolo Bonzini <pbonzini@redhat.com>
 R: Marc-André Lureau <marcandre.lureau@redhat.com>
 R: Daniel P. Berrange <berrange@redhat.com>
-R: Thomas Huth <thuth@redhat.com>
 R: Philippe Mathieu-Daudé <philmd@linaro.org>
 S: Maintained
 F: meson.build