app-crypt/envchain: drop to m-n

Closes: https://bugs.gentoo.org/632980
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

app-crypt/envchain/metadata.xml

@@ -1,14 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
-  <maintainer type="person">
-    <email>her@sorah.jp</email>
-    <name>Sorah Fukumori</name>
-  </maintainer>
-  <maintainer type="project">
-    <email>proxy-maint@gentoo.org</email>
-    <name>Proxy Maintainers</name>
-  </maintainer>
+  <!-- maintainer-needed -->
   <longdescription lang="en">
     Set environment variables with OS X keychain or D-Bus secret service.
     Envchain allows you to save credentials in a secure vault to use as