dev-libs/libdbusmenu-qt: drop to maintainer-needed

Bug: https://bugs.gentoo.org/938823
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

dev-libs/libdbusmenu-qt/metadata.xml

@@ -1,10 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
-	<maintainer type="project">
-		<email>kde@gentoo.org</email>
-		<name>Gentoo KDE Project</name>
-	</maintainer>
+	<!-- maintainer-needed -->
 	<upstream>
 		<remote-id type="launchpad">ubuntu</remote-id>
 	</upstream>