net-im/telegram-desktop-bin: remove myself as maintainer

I do not really use telegram anymore, so stepping back.

Closes: https://github.com/gentoo/gentoo/pull/44465
Signed-off-by: Henning Schild <henning@hennsch.de>
Signed-off-by: Yixun Lan <dlan@gentoo.org>

net-im/telegram-desktop-bin/metadata.xml

@@ -1,14 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
-  <maintainer type="person" proxied="yes">
-    <email>henning@hennsch.de</email>
-    <name>Henning Schild</name>
-  </maintainer>
-  <maintainer type="project" proxied="proxy">
-    <email>proxy-maint@gentoo.org</email>
-    <name>Proxy Maintainers</name>
-  </maintainer>
+  <!-- maintainer-needed -->
   <upstream>
     <remote-id type="github">telegramdesktop/tdesktop</remote-id>
   </upstream>