maintainers: drop sno2wman (#414721)

pkgs/by-name/ki/killport/package.nix

···
     description = "Command-line tool to easily kill processes running on a specified port";
     homepage = "https://github.com/jkfran/killport";
     license = lib.licenses.mit;
-    maintainers = with lib.maintainers; [ sno2wman ];
+    maintainers = with lib.maintainers; [ ];
     mainProgram = "killport";
   };
 })

pkgs/by-name/ya/yamlfmt/package.nix

···
     homepage = "https://github.com/google/yamlfmt";
     changelog = "https://github.com/google/yamlfmt/releases/tag/v${version}";
     license = lib.licenses.asl20;
-    maintainers = with lib.maintainers; [ sno2wman ];
+    maintainers = with lib.maintainers; [ ];
     mainProgram = "yamlfmt";
   };
 }