maintainers: fix out-of-date github accounts (#432818)

maintainers/maintainer-list.nix

···
     github = "carlthome";
     githubId = 1595907;
   };
-  carpinchomug = {
-    email = "[e-mail]";
-    github = "carpinchomug";
-    githubId = 101536256;
-    name = "Akiyoshi Suda";
-  };
   cartr = {
     email = "[e-mail]";
     github = "cartr";
···
   seylerius = {
     name = "Sable Seyler";
     email = "[e-mail]";
-    github = "seylerius";
+    github = "sableseyler";
     githubId = 1145981;
     keys = [ { fingerprint = "7246 B6E1 ABB9 9A48 4395  FD11 DC26 B921 A9E9 DBDE"; } ];
   };

pkgs/by-name/li/libctl/package.nix

···
     mainProgram = "gen-ctl-io";
     homepage = "https://github.com/NanoComp/libctl";
     license = licenses.gpl2Only;
-    maintainers = with maintainers; [ carpinchomug ];
+    maintainers = [ ];
   };
 }