maintainers: remove bmanuel (#445609)

maintainers/maintainer-list.nix

···
     githubId = 52386117;
     name = "Blusk";
   };
-  bmanuel = {
-    name = "Benjamin Manuel";
-    email = "[e-mail]";
-    github = "bmanuel";
-    githubId = 3662307;
-  };
   bmilanov = {
     name = "Biser Milanov";
     email = "[e-mail]";

pkgs/by-name/co/copacetic/package.nix

···
     description = "Tool for directly patching vulnerabilities in container images";
     license = lib.licenses.asl20;
     mainProgram = "copa";
-    maintainers = with lib.maintainers; [ bmanuel ];
+    maintainers = with lib.maintainers; [ ];
   };
 }

pkgs/by-name/ka/kanata/package.nix

···
     description = "Tool to improve keyboard comfort and usability with advanced customization";
     homepage = "https://github.com/jtroo/kanata";
     license = licenses.lgpl3Only;
-    maintainers = with maintainers; [
-      bmanuel
-      linj
-    ];
+    maintainers = with maintainers; [ linj ];
     platforms = platforms.unix;
     mainProgram = "kanata";
   };