gnustep-apps/terminal: Remove proxy-maint

Remove proxy maintainer project from metadata, because there was no
proxied maintainer left.
Reported-By: Michael Mair-Keimberger
Package-Manager: Portage-2.3.11, Repoman-2.3.3

gnustep-apps/terminal/metadata.xml

@@ -5,13 +5,8 @@
  <email>[email protected]</email>
  <name>Gentoo GNUstep Project</name>
 </maintainer>
-<maintainer type="project">
- <email>[email protected]</email>
- <name>Proxy Maintainers</name>
-</maintainer>
 <longdescription>
 Terminal.app - copyright (c) 2002 Alexander Malmberg [email protected]
-
 a terminal emulator for GNUstep
 </longdescription>
 </pkgmetadata>