nimbo: remove @alexeyre from maintainers

pkgs/applications/misc/nimbo/default.nix

···
     description = "Run machine learning jobs on AWS with a single command";
     homepage = "https://github.com/nimbo-sh/nimbo";
     license = licenses.bsl11;
-    maintainers = with maintainers; [ alexeyre noreferences ];
+    maintainers = with maintainers; [ noreferences ];
   };
 }