dev-tex/sketch: Removed proxied maintainer

Removed proxied maintainer due to inactivity.
Closes: https://bugs.gentoo.org/633146
Package-Manager: Portage-2.3.13, Repoman-2.3.4

dev-tex/sketch/metadata.xml

@@ -2,19 +2,11 @@
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
 <maintainer type="person">
-  <email>[email protected]</email>
-  <name>Alexis Ballier</name>
-</maintainer>
-<maintainer type="person">
-  <email>[email protected]</email>
-  <name>Dmitry Dzhus</name>
-</maintainer>
-<maintainer type="project">
-  <email>[email protected]</email>
-  <name>Gentoo TeX Project</name>
+	<email>[email protected]</email>
+	<name>Alexis Ballier</name>
 </maintainer>
 <maintainer type="project">
-  <email>proxy-maint@gentoo.org</email>
-  <name>Proxy Maintainers</name>
+	<email>tex@gentoo.org</email>
+	<name>Gentoo TeX Project</name>
 </maintainer>
 </pkgmetadata>