x11-misc/slop: drop myself as maintainer

i've switched over to x11-misc/selx (from ::guru) and don't use
this anymore. upstream is very slow though, so picking up
maintainership should be easy if someone wants to.

Signed-off-by: NRK <nrk@disroot.org>
Closes: https://github.com/gentoo/gentoo/pull/41615
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

x11-misc/slop/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>nrk@disroot.org</email>
-		<name>NRK</name>
-	</maintainer>
-	<maintainer type="project" proxied="proxy">
-		<email>proxy-maint@gentoo.org</email>
-		<name>Proxy Maintainers</name>
-	</maintainer>
+	<!-- maintainer-needed -->
 	<longdescription>
 		slop (Select Operation) is an application that queries for a selection
 		from the user and prints the region to stdout. It grabs the mouse and