[seahorse] Update seahorse maintainers.

[Niels De Graef <nielsdg src gnome org>]

commit 432d242c8ecd4d620d7c76622b51193b24382eb3
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sun Sep 17 11:51:13 2017 +0200

    Update seahorse maintainers.
    
    Add myself and Daiki Ueno and remove Adam Schreiber.
    Also remove redundant (and deprecated) MAINTAINERS file.

 MAINTAINERS   |    7 -------
 seahorse.doap |   13 ++++++++++---
 2 files changed, 10 insertions(+), 10 deletions(-)
---
diff --git a/seahorse.doap b/seahorse.doap
index 002a00b..db1a295 100644
--- a/seahorse.doap
+++ b/seahorse.doap
@@ -25,9 +25,16 @@ perform operations from their regular applications, like nautilus or gedit.</des
        
        <maintainer>
                <foaf:Person>
-                       <foaf:name>Adam Schreiber</foaf:name>
-                       <foaf:mbox rdf:resource="mailto:sadam gnome org" />
-                       <gnome:userid>sadam</gnome:userid>
+                       <foaf:name>Niels De Graef</foaf:name>
+                       <foaf:mbox rdf:resource="mailto:nielsdegraef gmail com" />
+                       <gnome:userid>nielsdg</gnome:userid>
+               </foaf:Person>
+       </maintainer>
+       <maintainer>
+               <foaf:Person>
+                       <foaf:name>Daiki Ueno</foaf:name>
+      <foaf:mbox rdf:resource="mailto:ueno gnu org" />
+                       <gnome:userid>dueno</gnome:userid>
                </foaf:Person>
        </maintainer>
        <maintainer>