media-sound/plexamp: drop myself as a maintainer

Signed-off-by: Itai Ferber <itai@itaiferber.net>

media-sound/plexamp/metadata.xml

@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
-  <maintainer type="person">
-    <email>itai@itaiferber.net</email>
-    <name>Itai Ferber</name>
-  </maintainer>
+  <!-- maintainer needed -->
 </pkgmetadata>