dev-haskell/primitive: 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

dev-haskell/primitive/metadata.xml

@@ -4,12 +4,7 @@
 	<maintainer type="project">
 		<email>[email protected]</email>
 	</maintainer>
-	<maintainer type="project">
-		<email>[email protected]</email>
-		<name>Proxy Maintainers</name>
-	</maintainer>
 	<longdescription>
-
 		This package provides wrappers for primitive array operations from
 		GHC.Prim.
 
@@ -32,7 +27,6 @@
 		* New in "Data.Primitive.Addr": @copyAddr@, @moveAddr@
 
 		* Deprecated in "Data.Primitive.Addr": @memcpyAddr@
-
 	</longdescription>
 	<upstream>
 		<remote-id type="github">haskell/primitive</remote-id>