minesector: remove federicoschonborn from maintainers

Signed-off-by: Federico Damián Schonborn <[e-mail]>

pkgs/by-name/mi/minesector/package.nix

···
     homepage = "https://github.com/grassdne/minesector";
     license = lib.licenses.mit;
     platforms = lib.platforms.unix;
-    maintainers = with lib.maintainers; [ federicoschonborn ];
+    maintainers = with lib.maintainers; [ ];
   };
 })